Jackco Model 65500 - Manual (Page 5)

Caution: To prevent personal injury, all inspection, maintenance, and repair
procedures must be performed when the jack is free of load.
TROUBLESHOOTING
Trouble Cause Solution
Does not lift at all
1) No hydraulic oil 1) Fill hydraulic oil
2) Release valve opened 2) Try again to rotate the
handle to insure position
3) mal-functioned delivery
and / or by-pass valve
3) Check for dust of foreign
debris and clean
4) Packings defective 4) Replace packing
Lifting only half way
5) Lack of hydraulic oil (in
most case)
5) Fill hydraulic oil
Load will not hold
6) Improper contact of
suction valve, delivery and/
or by-pass
6) Clean valves and adjust
valves contact
a) Lifting is improper contact of
suction valve
b) Lowering is improper
contact of delivery valve
7) Worn out piston packing 7) Replace packing
Does not lower
8) Release valve obstructed
by foreign debris
8) Clean release valve
Poor lifting
9) Defective pump packings 9 ) C l e a n v a l v e s r e p l a c e
packings, replace hydraulic oil
5