Stryker Medical 9711030047, Maintenance Manual

Page: 16 / 154

15
Service Information
HYDRAULIC CHECK VALVE REPLACEMENT (CONT’D)
Replacement of Valve (Poppet) #2
WARNING
To avoid personal injury or damage to the stretcher, remove the litter and the base hood before beginning
service on the jacks. Lower the jack rod completely to relieve the pressure on the pump piston side of the
jack. This will prevent large hydraulic fluid loss and possible damage when the base plugs are removed.
1. Remove the base plug (7) and discard the seal (8).
2. Remove the compression spring (9).
3. Using a small needle nose pliers, remove the poppet (2).
4. Install the new poppet (2).
5. Install the compression spring (9).
6. Install the new seal (8) and the base plug (7) and tighten to 10 foot–pounds torque.
7. Pump up the jack to the maximum height to check its operation.
8. Check for hydraulic leaks before replacing the base hood and the litter.
REMOVAL OF EXCESS AIR (VACUUM) FROM THE HYDRAULIC SYSTEM
Procedure:
1. Verify all hydraulic linkages are secure and operating properly (see pedal linkage adjustment procedure
page 10).
2. Using pump pedal, actuate system several times. This will force the air through the system and the jack
should now pump up.
BRAKE ADJUSTMENT
Required Tools:
3/32” Hex Allen Wrench
Pry Bar
Thread ”Locktite”