4. Using a 5/8" combination wrench, loosen (do not remove) the jam nut on the cylinder hose fitting (B) and unthread the
fitting from the hydraulic cylinder (C) (Figure 37). Save all parts for reinstallation.
5. Using a 1/8" hex wrench, remove the velocity fuse (D) from the hydraulic cylinder (C) (Figure 37). Discard the fuse.
6. Reverse steps to reinstall.
NNoottee -- When you reinstall the cylinder hose fitting (B), lubricate the O-ring with ATF and only thread the fitting in until
you feel resistance. When you align the fitting for proper position, do not back out more than 340 degrees from where
you felt resistance. Use a torque wrench to torque the jam nut of the fitting to 190±10 in-lb.
7. Check the fluid level before you return the product to service. See
Filling the reservoir
(page 60).
8. Verify proper operation before you return the product to service.
FFiigguurree 3377 –– VVeelloocciittyy ffuussee ccoommppoonneennttss
NNoonn--lloocckkiinngg mmaannuuaall vvaallvvee rreemmoovvaall aanndd rreeppllaacceemmeenntt
TToooollss rreeqquuiirreedd::
• 7/16" deep well socket
• 7/8" deep well socket
• 3/8" drive ratchet
• 1/16" hex wrench
PPrroocceedduurree::
1. Pull the trolley assembly out of the patient compartment until it locks into the loading position.
NNoottee -- This makes working on the product easier, but is not required.
2. Lower the lifting arms down.
3. Remove the trolley covers. See
Cover removal and replacement
(page 35).
4. Remove the manual release button assembly. See
Manual release button assembly removal and replacement
(page
37).
5. Using a 7/16" deep well socket and 3/8" drive ratchet, remove the Nylock hex nut (A) that secures the non-locking
manual valve (B) to the manual release link (C) (Figure 38).
6390-309-002 Rev AB.0 53 EN
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