Kohler ECV940 / ECV980 — Adjust Valve Clearance (AVT only)
Adjustments · Cylinder head valve train
For the Kohler ECV940 / ECV980, from the Kohler service manual.
Applies to: Kohler ECV940, Kohler ECV980
Procedure
- Turn adjusters in rocker arms clockwise by hand only enough to capture push rods in recesses.
- Rotate crankshaft to establish TDC on compression stroke for cylinder 1.
- Compress lifter and bottom plunger; insert 0.406/0.483 mm (0.016/0.019 in.) feeler gauge between valve end and rocker arm.
- Turn adjuster until slight drag is felt; hold and tighten locking setscrew to 7.7 N·m (69 in. lb.); recheck.
- Repeat for other valve on this side.
- Viewed from PTO end, rotate crankshaft 270° (3/4 turn) counterclockwise aligning keyway with cylinder 2.
- Repeat steps 3-5 for cylinder 2.
- Rotate crankshaft to check free operation of valve train; minimum valve spring coil clearance 0.25 mm (0.010 in.).
Tools required
- Feeler gauge 0.406/0.483 mm (0.016/0.019 in.) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Valve clearance 0.406/0.483 mm (0.016/0.019 in.)
- Setscrew torque 7.7 N·m (69 in. lb.)
- Minimum valve spring coil clearance 0.25 mm (0.010 in.)
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.