MAINTENANCE CHECKLIST OPERATOR MANUAL 600E2
6-10 PUBLISHED 04-26-2019 CONTROL # 113-09
System cuts out too early or too late
Wrong table selected.
Check to see which table is selected using
the single character display. If the wrong
table is selected, select the proper table
using the procedure in the system
installation section.
Single sensor not zeroed.
Ensure that the electronics box is tightly
mounted to the extension. Zero the angle
sensor using the procedure in the system
installation section.
Configuration switch stuck open or closed
(two section extensions only).
Configuration switch must be closed when
the extension is Retracted and open when
the extension is extended. Adjust or replace
switch As necessary.
Pivot pin not free to move.
Ensure that pivot pin is free, well lubricated,
and allows the extension head to pivot freely.
Inspect and replace bearings in extension
head assembly as required.
Foreign object stuck between extension
head assembly and extension. The only
contacts between the extension head
assembly and the extension are to be the
load cell and the pivot pin.
Remove any foreign objects which interfere
with extension head assembly operation.
Extension Jack Troubleshooting
Will not lift load
No oil in system
Release valve not closed
Add oil to reservoir tank through oil filler hole
Turn handle clockwise tightly
Will lift load only part way Oil level low Add oil to reservoir tank through oil filler hole
Will lift load but will not hold
The following valve or valves leaking
• Suction valve
• Delivery valve
• Release valve
Replace jack
Packings worn or damaged Replace jack
Jack will not lower
Release valve stuck, probably dirt or
foreign matter
Transfer load then replace dirty oil, flush oil
reservoir with kerosene
Poor lifting
Dirty oil
Air in hydraulic system
Change hydraulic oil
Purge air from system
Poor pumping action
Oil seal for pump unit worn in out or
damaged
Replace jack
Condition Possible Cause Possible Solution
Fo
r
Reference
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