DAF 95XF. Manual — part 568
8
DIAGNOSIS
Contents
2
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8
Single rear axle 1347
DIAGNOSIS
1-1
1. SINGLE REAR AXLE 1347
1.1 FAULT-FINDING TABLE
FAULT: NOISES IN REAR AXLE AND DRIVE ASSEMBLY
Possible cause
Remedy
Oil level too low
Top up oil
Oil with incorrect viscosity
Drain oil and top up
Loosened attachment bolts or broken
differential-lock parts
Drain oil and check drained oil for presence of
pieces of metal
Pinion-bearing play
Adjust and/or replace
FAULT: OIL LEAKAGE
Possible cause
Remedy
Oil level too high
Drain oil
Oil with incorrect viscosity
Drain oil and top up
Leaking oil sealing ring
Replace oil sealing ring
Bleeding system blocked
Clean or replace the bleeding system
Oil leakage between the differential housing
mating surfaces
Clean mating surfaces and apply new sealing
compound
FAULT: DIFFERENTIAL LOCK IS NOT FUNCTIONING
Possible cause
Remedy
No air pressure at engaging cylinder
Check compressed-air system
Defective pneumatic control
Check or replace pneumatic switch
Defective mechanical switch control
Check switch control
FAULT: DIFFERENTIAL-LOCK WARNING LAMP IS NOT FUNCTIONING
Possible cause
Remedy
Switch on cylinder fitted too high
Readjust switch
Switch on cylinder defective
Replace switch
Fault in electrical circuit
Check electrical circuit
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1
8
DIAGNOSIS
Single rear axle 1347
1-2
FAULT: VIBRATIONS IN THE DRIVE LINE
Possible cause
Remedy
Lifted trailing axle causes excessive in
spring-leafed models
-
Limit the trailing axle lifting height, see
chapter “Inspection and adjustment”
-
Install a key between the spring assembly
and the spring seat, see chapter “Inspection
and adjustment”
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8
Single rear axle 1354
DIAGNOSIS
2-1
2. SINGLE REAR AXLE 1354
2.1 FAULT-FINDING TABLE
FAULT: NOISES IN REAR AXLE AND DRIVE ASSEMBLY
Possible cause
Remedy
Oil level too low
Top up oil
Oil with incorrect viscosity
Drain oil and top up
Loosened attachment bolts or broken
differential-lock parts
Drain oil and check drained oil for presence of
pieces of metal
Pinion-bearing play
Adjust and/or replace
FAULT: OIL LEAKAGE
Possible cause
Remedy
Oil level too high
Drain oil
Oil with incorrect viscosity
Drain oil and top up
Leaking oil sealing ring
Replace oil sealing ring
Bleeding system blocked
Clean or replace the bleeding system
Oil leakage between the differential housing
mating surfaces
Clean mating surfaces and apply new sealing
compound
FAULT: DIFFERENTIAL LOCK IS NOT FUNCTIONING
Possible cause
Remedy
No air pressure at engaging cylinder
Check compressed-air system
Defective pneumatic control
Check or replace pneumatic switch
Incorrect setting engaging cylinder
Adjust engaging cylinder
Defective mechanical switch control
Check switch control
FAULT: DIFFERENTIAL-LOCK WARNING LAMP IS NOT FUNCTIONING
Possible cause
Remedy
Defective pressure switch
Replace pressure switch
Fault in electrical circuit
Check electrical circuit
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