Troubleshooting; Malfunctions And Remedies - JLG t350 Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

Troubleshooting

Malfunction
Insufficient braking effect
Brake reacts by jerks
Trailer is braked unilaterally
Trailer is already braked when the accel-
erator pedal is released.
Reverse driving hard to accomplish or
even impossible
Braking action of handbrake insufficient
Wheel brakes get hot
Ball coupling does not rest on ball
3-26
Table 3-5. Malfunctions and Remedies
Cause
Excessive backlash in brake system
Brake linings not run in
Brake linings glazed, oily or damaged
Overrunning hitch hard to operate
Brake linkage is jammed or deformed
Brake Bowden cables rusty or kinked
Excessive backlash in brake system
Shock absorber of overrunning hitch defective Service at qualified workshop
Backmat brake shoe is jammed in the brake
shoe holder
Wheel brakes are actuated unilaterally
Shock absorber of overrunning hitch defective Service at qualified workshop
Brake system adjusted too tightly
Bowden cables pre-loaded
See "Brake reacts by jerks"
Incorrect setting
Brake system incorrectly set
Wheel brakes dirty
Reversing lever of overrunning hitch is
jammed
Spring type actuator is pre-loaded in zero posi-
tion; nuts are turned in too far
Handbrake lever not or only partially released
Coupling dirty on the inside
Ball of towing vehicle too big
– JLG Lift –
Remedy
Service at qualified workshop
Actuate hand-brake lever slightly; drive 1-2 miles (2-3 km)
Service at qualified workshop
Grease overrunning hitch
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Actuate handbrake lever as far as possible
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Service at qualified workshop
Set handbrake lever into zero position
Clean and grease properly
Check ball diameter: According to DIN 74058 the ball on the
tow vehicle must not exceed 50 mm in diameter when new
and it must be Ø 49.5 mm. If the ball diameter decreases to
less than 49.0 mm, the ball has to be replaced. The ball must
be perfectly spherical.
3121198