Parts & Service 21/09/2015
902-002-11 Rev 6
Page 13
SECTION 4:
Troubleshooting
4.0 TROUBLE SHOOTING GUIDE (cont.)
PROBLEM
CHECK
REMEDY
3. The I-Lock Safety Knuckle is slow
to or partially activates. (cont.)
Check for damage to Safety Knuckle
Replace parts if required
Check grease around I-Lock piston
Grease liberally
Check I-Lock spring assembly for
damage
Replace if required
4. There is oil leaking around the
I-Lock piston assembly
Check the hose connection on the
I-Lock piston
Tighten as necessary
Check seals, rod and bore of piston
assembly for damage
Remove the I-Lock piston assembly
and dismantle. Replace parts where
necessary and re-assemble.
5. The primary wedge is operating
slower than normal
Check that the operator is crowding
the bucket cylinder to create machine
pressure
Crowd the bucket cylinder to
overcome low idle pressure
Check the operating pressure that
extends the Primary Wedge
Adjust the pressure reducing valve if
required
Check the inlet port on coupler
directional control valve
Clean and clear any debris that is
present from the orifice
6. There is oil leaking around the
main cylinder in the coupler
Check hoses and connections to the
main cylinder
Tighten and replace as necessary
Check cylinder for damage
Remove main cylinder and dismantle.
Replace any damaged parts
7. Primary Wedge will not retract
Check coupler for any debris that
maybe lodged behind the Wedge
plate
Clear the debris
Inspect the Pilot Operated Safety
Check valve in main cylinder
Remove, clean and replace if
necessary
Check in-cab I-Lock Lock-Out switch
is functioning
See previous instructions
Check mechanical function of
solenoid spool valve for the Primary
Wedge circuit
Remove spool valve, clean and
clear any debris. Replace spool if
necessary
