Service Information
17
HYDRAULIC CHECK VALVE REPLACEMENT − NON−ELECTRIC LIFT BASE
Required Tools:
3/8 Open End Wrench Stiff Wire (with bent, pointed end) Small Needle Nose Pliers
3/4 Open End Wrench Torque Wrench (with Ft. Lbs. adjust.) 7/32 Hex Allen Wrench
1/2 Inch Diameter Rod
Replacement of Valve #1
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 (3) and discard the seal (4).
2. Remove the valve plug (5).
3. Using a stiff wire with a bent, pointed end, remove the valve (1) and the seal (6) and discard the seal.
4. Install the new seal (6) flat to the bottom of its hole with a 1/2” diameter rod.
5. Install the new valve (1) with the beveled end out (as shown in the illustration).
6. Install the valve plug (5) and tighten to 10 foot−pounds torque.
7. Install the new seal (4) with the base plug (3) and tighten to 10 foot−pounds torque.
8. Pump up the jack to the maximum height.
9. Be sure there are no hydraulic leaks before replacing the base hood and the litter.
FILLER PLUG
ITEM PART NO. PART NAME
1 926−20−153 Check Valve
2 715−1−341 Poppet
3 715−1−301 Base Plug
4 926−20−156 Seal
5 715−1−309 Valve Plug
6 926−20−154 Seal
7 715−1−301 Base Plug
8 926−20−156 Seal
9 390−2−134 Compression Spring
10 715−270−100 Valve Assembly*
10 2025−700−26 Valve Assembly**
11 715−100−325 Pump Piston
* Used on jack part number 1231−70−10.
** Used on jack part number 1231−70−210.
(See label on side of jack reservoir for jack
part number).
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