Kohler — Lift Cylinder Internal Leakage Test
Testing & diagnosis
From a Kohler service manual — check it applies to your exact model before use.
Applies to: Kohler LH775 engine
Procedure
- Shut off engine and engage parking brake.
- Remove all pressure from lift cylinder by fully retracting it (lift lever in LOWER position).
- Disconnect hydraulic hose from base end of cylinder; install steel plug with O-ring seal in hose; clean cylinder port.
- Start engine and apply pressure to rod end of cylinder (LOWER position).
- If any oil comes out of open cylinder port, cylinder has internal leak; repair or replace.
- Reconnect hose when complete; repeat for second lift cylinder if necessary.
Tools required
- Steel plug with O-ring seal Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.