11
Service Information
HYDRAULIC SYSTEM TROUBLESHOOTING
NOTE
Be sure the pedal linkage has been adjusted properly before beginning service on the jacks (see page 7
or page 8).
PROBLEM/SYMPTOM SOLUTION
Jack will not raise to full height. Add hydraulic fluid (see p.12). Check for leaks.
Jack will not hold in raised position. Close the needle valve completely. If the jack
holds, replace valve #1 (see p. 14). If the jack
does not hold, replace valve #2 (see p. 15).
Jack will not pump up and the jack actuator rod
does not move.
Close the needle valve. If the jack will now pump
up, replace valve #1. If the jack still will not pump
up after closing the needle valve, replace valve #3
(see p. 15).
Jack will not pump up but the jack actuator rod
does move when the pump pedal is activated.
Replace valve #2 (see p. 15).
Jack will not pump up and the jack actuator rod
may or may not move.
Remove excess air (vacuum) in system (see p.
12).
Contact Stryker technical service at 1–800–327–0770 for further assistance.
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