Single cylinder heads must be flat within 0.03 mm [0.001 -
inch] between any two adjacent capscrew holes.
Single cylinder top cover must be flat within 0.06 mm
[0.0024-inch] between any two adjacent capscrew holes
and 0.10 mm [0.004-inch] total.
Inspection of the valve seats in the valve
plate requires specialized equipment and is
beyond the scope of field service.
Use valve spring tester, Part No. 3375182, to check the
unloader valve spring. Replace any spring that does not
Install new springs.
Refer to the Compressor Spring Specifications chart
shown in Section V.
Install the exhaust valve over the post in the valve plate.