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1-38 1900-009-002 REV B www.stryker.com
English
Service
POPPET VALVE REPLACEMENT (HYDRAULIC BASE)
TOOLS REQUIRED:
• Small Needle Nose Pliers
• (2) Bungee Cord (or equivalent)
• 1/4 in. Allen Wrench
• 3/8 in. Drive Torque Wrench
• 1/4 in. Hex Bit Socket
PROCEDURE:
Note
Unless otherwise indicated, refer to Figure 11 (see page 1-36) for this procedure.
1. Raise the rails to the highest position and lower the litter to the lowest height. Apply the brakes.
2. Lift the base hood, separating the Velcro fasteners holding it to the base, and support it using bungee cords.
Note
The jack must be completely lowered to relieve the pressure on the pump piston side of the jack.
3. Using a 1/4 in. Allen wrench, remove the base plug (D) and the seal (L).
4. Remove the compression spring (C).
5. Using small needle nose pliers, remove the poppet valve (F).
6. Install the new poppet valve.
7. Reinstall the compression spring, seal, and base plug.
8. Using a 1/4 in. hex bit socket, torque the base plug to 10 ft-lb (13.5 N-m).
9. Pump the jack to the highest height. Apply weight to the stretcher and ensure the jack holds. Verify there are no
hydraulic leaks.
10. Remove the bungee cords and replace the base hood.
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