Routine Maintenance Information
SAFETY NOTICE:
It is strongly recommended that the Pro-Lok quick hitch is lowered to the ground, the machine
switched off and the ignition key removed, the parking brake engaged and blocks applied to
the wheels, that the system depressurised and safety gloves are worn during any
maintenance on the quick hitch. A warning label should be affixed prominently in the cab to
warn others of ongoing maintenance.
Daily Checks:
Daily checks are to be carried out before the use of the Pro-Lok quick coupler; the operator shall
have sufficient competence and training to perform the maintenance. During these checks, should
any faults that could compromise safety be identified they should be remedied immediately.
1. Clean away any material build up around the front lock, indicator bar and wedge.
2. Check all pin retaining bolts and nuts for tightness on the quick hitch and attachments.
3. Grease wedge slide housing points as required. It is necessary to remove attachments in order
to gain access to a grease nipple on the underside of the hitch.
4.
Grease threaded actuator points, as required
.
WARNING:
Ensure wedge plate is fully retracted before greasing.
5. Check the
Pro-Lok
for correct operation by connecting an attachment.
6. Check that the threaded actuator is firm to rotate in its housing. Adjust as required, see
“Adjusting the Threaded Actuator” on page 7.
7. Visually check the
Pro-Lok
for evidence of fatigue, weld failure or stress.
IMPORTANT:
Due to the self-tightening and infinite wear feature accommodated with the wedge lock, if any
attachment is fitted to the hitch for long periods of time it should be released daily. If the daily
maintenance tasks are adhered to, this will happen automatically.
WARNING:
If the quick hitch is damaged in any way and/or there is any doubt as to the continued safety, cease
operation immediately and contact Harford Attachments Ltd, Technical Department on Europe: +44
(0)1603 403099, USA: 727 477 3044
IMPORTANT:
Any unauthorised modification of the quick hitch may compromise the safety of the operator and
those nearby, and will invalidate the product warranty.
