F0169 Backease Hoist Manual
Page 5 of 9
28/05/2014
Rev:03
Operating:
The boom can be raised and lowered by using the Remote Hand Control. The boom is raised by
the pump generating hydraulic pressure and is lowered by the activation of the lowering
solenoid allowing the weight of the boom and load to force oil out of the ram and back to the
reservoir at a regulated rate.
It is normal for the initial crane action to be "spongy". This is due to trapped air introduced into
the system by the hose, fittings and ram. The sponginess will disappear after several raising
and lowering actions. When sponginess has disappeared check oil level.
Maintenance Instructions:
Maintenance recommended at least every time the vehicle is
serviced.
1. Never operate crane with insufficient or unsuitable oil. Check oil level when the boom is
lowered. Overfilling of the reservoir is unlikely to cause damage but will lead to loss of
excess oil. Check quality of oil.
2. Check integrity of all electrical connections. Check routing of and condition of control cable,
power and earthing cables. Ensure there is no chafing or rubbing through on any cables as
damaged cables can cause serious damage and even uncontrolled lifting of boom.
3. Check routing of and condition of hydraulic hose.
4. Check condition of lifting hook and lifting hook pin and retaining clip regularly.
5. Grease collar at top of crane base unit. Boom post can be lifted right out to grease if
required.
6. Check all mounting bolts are securely tightened.
7. Small squirt of oil into cylinder breather to lubricate dry end of cylinder.
Trouble Shooting:
If the crane has been installed in accordance with these instructions and illustrations then it will
provide many years of satisfactory service. If the crane does not function
correctly check the following points.
Symptom:
Crane will not operate.
Cause
no oil
Remedy
fill reservoir with hydraulic oil.
Cause
faulty electrical connections.
Remedy
check electrical connections to battery.
check that power unit/tray is earthed to chassis
check electrical connections to the power unit.
rectify faulty connections.
Symptom:
Crane will not lower after being partially raised.
Cause
Lowering solenoid not operating correctly.
Remedy
Check wiring to lowering solenoid. If okay, listen for a click from the
solenoid as you press and release toggle switch to down position.
If there is no click then the solenoid may not be operating. Contact
manufacturer.
Symptom:
Crane lowers from partially raised position but will not lower from fully
raised position i.e. - jams at top.
Cause
The Hose Burst Valve has locked shut due to back pressure in the
hydraulic circuit. Given time it will release. If the problem reoccurs contact the
manufacturer.
Symptom:
Crane ceases to operate. Vehicle taillights cease to function.
Cause
Power unit is not separately earthed to chassis. (Temporary earthing
was possibly achieved through tail light wiring).
Remedy
Earth power unit to chassis with earthing cable supplied.
Check taillight wiring for damage. Replace lighting fuse if blown.
Guarantee:
