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1989 Wanderlodge Wide Body Pusher (WB) (view source)

Revision as of 14:02, 12 November 2019

9,631 bytes added ,  14:02, 12 November 2019
→‎Brake Failures
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==Air Brake Systems==
 
==Air Brake Systems==
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<br />Introduction Your motorhome is equipped with dual service air brake systems for front, rear and tag axle brakes , with integral fail/safe operation; and manual/automatic rear spring (parking) brakes. As shown in the air brakes system diagram in Section X, the service brakes are completely independent systems, each including a reservoir and separate distribution lines and valves. A separate reservoir is also supplied for the rear spring brakes , which function independently of the service brakes. All three reservoirs are pressurized from a single compressor. Both service brake systems are brought into operation each time the brake treadle is depressed to slow or stop the coach. Reservoir pressure for each service brake system is monitored by a respective pressure gauge on the front panel ; system failure(s) are indicated by low pressure readings , illumination of the Low Air failure lamp and sounding of buzzer (item 10, figure 2-3).
     −
<br />
+
=== Introduction ===
 +
Your motorhome is equipped with dual service air brake systems for front, rear and tag axle brakes , with integral fail/safe operation; and manual/automatic rear spring (parking) brakes. As shown in the air brakes system diagram in Section X, the service brakes are completely independent systems, each including a reservoir and separate distribution lines and valves. A separate reservoir is also supplied for the rear spring brakes , which function independently of the service brakes. All three reservoirs are pressurized from a single compressor. Both service brake systems are brought into operation each time the brake treadle is depressed to slow or stop the coach. Reservoir pressure for each service brake system is monitored by a respective pressure gauge on the front panel ; system failure(s) are indicated by low pressure readings , illumination of the Low Air failure lamp and sounding of buzzer (item 10, figure 2-3).
   −
=== Operation ===
+
===Operation===
 
When the coach is parked, and the engine off, the rear spring brakes will normally be set by operating the parking brake. The spring brakes cannot be fully released until the air pressure is above 65 psi. These brakes are in the released position when the control is pushed in. In the event that there is a loss of air pressure , the spring brakes will set automatically , at the brake-applied position, and will not release until the air reserve has again built up to required value. Consequently , there will be a normal delay, after the coach is first started , before the compressor builds up sufficient pressure in the three reservoir tanks , before the brakes can be released and the coach driven. When the brake treadle is depressed , to slow or stop the coach, reservoir air is applied simultaneously to both front and rear service brakes to effect the braking action. The spring brakes are held in a released position by the air pressure supplied from the associated reservoir tank.  
 
When the coach is parked, and the engine off, the rear spring brakes will normally be set by operating the parking brake. The spring brakes cannot be fully released until the air pressure is above 65 psi. These brakes are in the released position when the control is pushed in. In the event that there is a loss of air pressure , the spring brakes will set automatically , at the brake-applied position, and will not release until the air reserve has again built up to required value. Consequently , there will be a normal delay, after the coach is first started , before the compressor builds up sufficient pressure in the three reservoir tanks , before the brakes can be released and the coach driven. When the brake treadle is depressed , to slow or stop the coach, reservoir air is applied simultaneously to both front and rear service brakes to effect the braking action. The spring brakes are held in a released position by the air pressure supplied from the associated reservoir tank.  
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'''Caution Do not attempt to drive the coach until system pressure is above 90 psi.'''  
 
'''Caution Do not attempt to drive the coach until system pressure is above 90 psi.'''  
   −
=== Brake Failures ===
+
===Brake Failures===
 
To compensate for normal lining wear, each brake system is individually self-adjusting. Brake system failures are protected against by a combination of fail/safe features. Each service braking system , front and rear, has a backup capability in the form of the rear spring brakes in the event of partial or total system failures. If the front brakes fail , operating the brake treadle activates both the rear service brakes and the rear spring brakes, providing sufficient braking action to effectively stop the coach. Under these conditions , the spring brakes do not lock in, as in a normal released position, but instead their application is "modulated " in the same manner as the service brakes, thereby providing a normal braking "feel". If a failure occurs in the rear, the front service brakes and rear spring brakes provide braking action. In the unlikely event of a failure where both service braking systems are disabled , the rear spring brakes will apply automatically and bring the vehicle to a stop. As a safety factor, the coach should not be moved until any type of brake failures are corrected.  
 
To compensate for normal lining wear, each brake system is individually self-adjusting. Brake system failures are protected against by a combination of fail/safe features. Each service braking system , front and rear, has a backup capability in the form of the rear spring brakes in the event of partial or total system failures. If the front brakes fail , operating the brake treadle activates both the rear service brakes and the rear spring brakes, providing sufficient braking action to effectively stop the coach. Under these conditions , the spring brakes do not lock in, as in a normal released position, but instead their application is "modulated " in the same manner as the service brakes, thereby providing a normal braking "feel". If a failure occurs in the rear, the front service brakes and rear spring brakes provide braking action. In the unlikely event of a failure where both service braking systems are disabled , the rear spring brakes will apply automatically and bring the vehicle to a stop. As a safety factor, the coach should not be moved until any type of brake failures are corrected.  
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 +
 +
'''Note:''' With the front brake system service reservoir fully charged, enough air pressure is available to provide for four full releases of the rear spring brakes. This will allow the coach to be brought to a safe position until repairs can be accomplished.
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 +
=== Additional Air-Operated Equipment ===
 +
Besides providing the compressed air supply for the coach braking systems , the compressor also provides the air supply for the entry step, side-slide mechanism on driver's and co-pilot's seats, front air vents , stepwell cover plate, tag axle and air suspension system (air bags) - all via separately controlled solenoid switches operated from the dash , or at other locations throughout the coach. (This compressed air source is furnished from the front right side reservoir.) A compressed air outlet fitting and air gun is contained in the center storage compartment on the left side of the coach , convenient for blowing out the water system, inflating tires, and so on. A Schrader valve (air connection} is available in the engine compartment to allow the air system to be pressurized from a "shop" source without the necessity of starting the engine.
 +
 +
=== Compressed Air System Air Dryer ===
 +
The air dryer unit collects and removes moisture and contaminants from the compressor air output before the air reaches the reservoirs . This unit is different from a reservoir drain or an after-cooler in that it provides dry air for the brake system by eliminating the possible accumulation of condensate in the system reservoirs. Note that each reservoir also has a drain cock on the bottom for draining accumulated moisture. This assure s a long maintenance-free life for air brake system components due to the removal of system contaminants. The air dryer is located between the compressor discharge (output) line and the compressed air reservoirs . A safety valve mounted in the air dryer housing assembly protects against excessive pressure buildup. The desiccant cartridge and pleated paper oil filters are easily removable and replaceable as a complete serviceable unit. The desiccant "beads" which provide the drying action have a large capacity for absorption due to their combined surface area. In addition, an internal thermostatically-controlled heating element prevents freeze-ups on the purge drain valve when the unit is used during sub-freezing temperatures. Purging of the dryer is automatic , exhausting combined oil and water residue to the atmosphere. At the same time that the contaminants are purged the reverse air flow across the desiccant material removes the accumulated moisture and reactivates the desiccant. Cartridge replacement should be accomplished at 3 years or 300,000 miles; sooner , if the cartridge has become contaminated .
 +
==Maintenance Data==
 +
This section provides general information for use in performing scheduled services as well as preventive and routine maintenance on your Wanderlodge.
 +
 +
 +
'''Caution''' Cooling fan is driven by hydraulic pressure. Flow is controlled electrically by a thermostat which senses engine coolant temperature. Any time the engine is running the fan may engage and start without warning. Also on hydraulically driven fans, the fan may start and run for several seconds when the engine is shut off or if electrical power is interrupted. Shut off engine and wait for fan to stop before servicing. When inspecting or servicing engine or other components in engine compartment the engine control switch must be placed in OFF or REAR position to prevent starting of the engine from the driver's area.
 +
 +
=== Engine and Chassis Specifications ===
 +
{| class="wikitable"
 +
!Description
 +
!Spec.
 +
|-
 +
|
 +
=== Specifications ===
 +
|
 +
|-
 +
|Engine Detroit Diesel 8v92TAC
 +
|475HP, 450HP (Calif.)
 +
|-
 +
|Transmission
 +
|Allison HTB741/4 Speed
 +
|-
 +
|Chassis GVWR
 +
|45,200 lb. max
 +
|-
 +
|Front Axle
 +
|14,600 lb
 +
|-
 +
|Rear Axle
 +
|23,000 lb.
 +
|-
 +
|Tag Axle
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|10,000 lb.
 +
|-
 +
|Wheelbase
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|247"
 +
|-
 +
|Air Brake System
 +
|
 +
|-
 +
|Front Axle
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|Self-adjusting 16.5" x 5" brakes
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|-
 +
|Rear & Tag Axles
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|Self-adjusting 16.5" x 7" brakes
 +
|-
 +
|Air Reservoirs
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|Four Air Tanks 6,520 cu. in.
 +
|-
 +
|Retarder
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|Akkusib Transmission Brake/Retarder
 +
|-
 +
|Wheels & Tires (8)
 +
|Aluminum rim, 11R22.5 16 PR tubeless steel-belted radial
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|-
 +
|Tire Inflation
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|<See information plate inside generator battery door>
 +
|-
 +
|Axle Ratio
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|3.42:1
 +
|-
 +
|Belts
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|
 +
|-
 +
|Alternator
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|WL P/N 3740115- Dayco 42-1017 (2)
 +
|-
 +
|A/C Compressor (Set)
 +
|WL P/N 0921908 (1)
 +
|-
 +
|Leveling Jacks (Hydraulic)
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|
 +
|-
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|Front (each)
 +
|32,000 lb. rating
 +
|-
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|Rear (each)
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|48,000 lb. rating
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|-
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|Trailer Hitch Ball Nut
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|Torque 200 ft.-lb.
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|}
 +
 +
=== Engine /Chassis Capacities ===
 +
{| class="wikitable"
 +
|Diesel Fuel Tank
 +
|300 gallons
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|-
 +
|Fuel Additive
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|US Borax Biobor JF Fuel Additive - use 2.8 fl. oz. per 100 gallons
 +
|-
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|Lubrication System
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|Crankcase Capacity
 +
Dry . . . . . . . . . . 6V92-2 3 qts.; 8V92 25-qts.
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Refill . . . . . . . . . 6V92-21 qts.; 8V92 23-qts.
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|-
 +
|Cooling System
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|Specification: Low Silicate Ethylene Glycol Base Antifreeze
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(Formulation standard GM 6038-M)
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 +
Capacity: ~117 qts.-8V92 with cockpit and living area heaters
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|-
 +
|Engine Oil Specifications
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|API:  CC/SE, CC/SF, CD/SC, CD/SE, or CD/SF
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30 degrees to 100 degrees F: SAE 40 , SAE 30
 +
 +
Below 30 degrees F: SAE 40, SAE 30, or 15W-40
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|-
 +
|Frequency of oil change
 +
|Every Year or 20,000 miles
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|-
 +
|Oil Filter
 +
|WL P/N 3734209 (AC PF911 or FLEETGUARD LF 3333)
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Change filter every oil change
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|-
 +
|Power Steering and
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Hydraulic Engine Cooling Fan
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|Specification: 10W-30 Motor Oil
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Capacity: 20 quarts
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 +
Filter Element: WL P/N 2122026 (Parker 925835)
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|-
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|Reservoir Element
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|WL P/N 2137065 (3 req'd)
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|-
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|Frequency of Filter Change
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|Every Oil Change
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|-
 +
|Leveling Jacks
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|Spec: Dexron II
 +
Capacity: 20 quarts
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|-
 +
|Transmission
 +
|Spec: Dexron, Dexron II
 +
Capacity: 19 quarts MTB 654 and 33 quarts HTB 748 including filter and cooler
 +
|}
 +
 +
=== Gradeability (Hill Climbing) ===
 +
{| class="wikitable"
 +
!
 +
!45,200
 +
GVWR %
 +
!55,200 GVWR +
 +
Max Towing Wt %
 +
!Speed MPH
 +
|-
 +
|1st
 +
|17.7
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|14.4
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|15.3
 +
|-
 +
|2nd
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|7.5
 +
|6.1
 +
|35.8
 +
|-
 +
|3rd
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|4.4
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|3.5
 +
|52.4
 +
|-
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|4th
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|1.9
 +
|1.4
 +
|73.1
 +
|}
 +
 +
=== Generator Capacities and Specifications ===
 +
{| class="wikitable"
 +
|Electrical Rating
 +
|12.5KW at 120 Vac
 +
|-
 +
|Fuel Supply
 +
|Diesel, separate pickup in main tank
 +
|-
 +
|Fuel Filter Racor element
 +
|WL P/N 3737673
 +
|-
 +
|Cooling System
 +
|Water-cooled 16 quarts
 +
|-
 +
|Crankcase Capacity
 +
|6.1 quarts
 +
|-
 +
|Oil Filter
 +
|WL PIN 3831328
 +
|-
 +
|Oil Specifications for Generator
 +
|API Classification . . . . . . . . . . . . . . . . . . . CD
 +
Below 50°F. . . . . . . . . . . . . . SAE 1 0W-20W
 +
 +
50°-68 °F. . . . . . . . . . . . . . . . . . . . 20W or 20
 +
 +
68°-95 °F. . . . . . . . . . . . . . . . . . . . . 30 or 40
 +
 +
Over 95°F. . . . . . . . . . . . . . . . . . . . . . . . . 50
 +
|-
 +
|Battery
 +
|12 volts 90AH
 +
|-
 +
|Air Filter Element
 +
|WL P/N 3779055 (Donaldson P10-2745 or P12-3065 )
 +
|}
 +
 +
=== Motorhome Capacities and Specifications ===
 +
{| class="wikitable"
 +
|Potable Water Tanks*
 +
|116 gallons
 +
|-
 +
|Holding Tank, Gray Water
 +
|100 gallons
 +
|-
 +
|Holding Tank, Waste
 +
|100 gallons
 +
|-
 +
|LPG Tank
 +
|148 lbs.-net (43.5 gallons)
 +
|-
 +
|Water Pump
 +
|3.5 GPM
 +
|-
 +
|Water Heater
 +
|10 gallons
 +
|-
 +
|Batteries
 +
|Six 6-volt batteries , series-parallel
 +
connected to supply 12v at 660AH
 +
|-
 +
|Battery Chargers
 +
|30-80 amperes output each
 +
|-
 +
|Air Conditioners**
 +
|Automotive: 18,000 BTU
 +
Roof (3): 13,500 BTU ea.
 +
|-
 +
|Hot Water Circulating Heaters
 +
|Living Room (3): 50,000 BTU ea.
 +
Bathroom: 15,000 BTU
 +
 +
Driver's Area: 90,000 BTU
 +
|-
 +
|Gas/Hot Air Heaters ***
 +
|Living Room: 32,000 BTU
 +
Bathroom: 15,000BTU
 +
|-
 +
|Electric Heaters
 +
|120 volt (4) 1500 watts ea.
 +
|}
 +
<nowiki>*</nowiki> 83 Gallons with cross-bed option (96 w/Queen)
 +
 +
<nowiki>**</nowiki>NEMA Rating
 +
 +
<nowiki>***</nowiki>SBBMA Rating
 +
<br />
 +
 +
=== Maintenance Schedule Summary ===
 
<br />
 
<br />
−
==Maintenance Data==
+
{| class="wikitable"
 +
|+
 +
!Item
 +
!Frequency
 +
!Type of Service
 +
!Specification
 +
|-
 +
|Transmission
 +
|At normal oil change intervals
 +
|Replace transmission tilter WL P/N 0998542 ,
 +
(AC PF-897) MTB654 WL P/N 3831302 ,
 +
 
 +
(AC HD-223) HTB 741
 +
|in cooler return line
 +
|-
 +
|
 +
|25,000 miles , or 12 months , whichever occurs first
 +
|Replace transmission fluid (Dexron or Dexron II)
 +
Replace transmission internal tilter WL PIN 3827540 (Kit DOA P/N 23019201) with MTB654 only
 +
|See Section X Diagram,
 +
Lubrication Guide for service of other
 +
 
 +
Engine/Chassis components
 +
|-
 +
|Batteries
 +
|Every 500 to 1,000 miles
 +
|Replenish cells with distilled water to %-inch above plates. Coat Battery terminals with lubricant
 +
|
 +
|-
 +
|Air Cleaner
 +
|10,000 to 15,000 miles
 +
|Replace when air cleaner indicator shows red after run at 2,000 R.P.M.
 +
Sometimes will show red after high power run (normal): Reset WL P/N 3734191 , (Donaldson P12-9396)
 +
|
 +
|-
 +
|Fuel Filters
 +
|10,000 to 15,000 miles
 +
|Replace as required Secondary Filter WL P/N 3734175 (Fleetrite FFR8206)
 +
Racor Filter and Water Separator Change when vacuum (RACOR) gauge goes into red.
 +
 
 +
Element WL P/N 3831310 (Racor 2020SM) Gasket (large) WL P/N 3747359(Racor11007)
 +
 
 +
Gasket (T-handle) WL P/N 3747342(Racor11350)
 +
|Experience may indicate interval revisions.
 +
|-
 +
|Air Brake System
 +
|
 +
|
 +
|
 +
|-
 +
|Reservoir Tanks
 +
|Daily or depending on usage (not necessary with air dryer)
 +
|Drain each reservoir tank of moisture by opening petcock at bottom of tank
 +
|
 +
|-
 +
|Air Compressor Air Dryer
 +
|23,000 miles , or every 3 months, or every 900 hours.
 +
Refer to Bendix Air Dryer Manual.
 +
|Check/replace air dryer cartridge WL P/N 2107753 (Bendix 287313)
 +
|
 +
|-
 +
|Air Suspension System
 +
|1,000 - 3,000 miles, or every month
 +
|Check air springs for even inflation
 +
Check for tightness of nuts , bolts , air connections
 +
 
 +
Check shock absorbers for oil leakage , worn bushings - No lubrication is required
 +
|
 +
|-
 +
|
 +
|
 +
|
 +
|
 +
|}
 +
 
    
===Specifications and Data===
 
===Specifications and Data===
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