CUMMINS N14 - INSTALLATION

• Measure the intake valve seat height.
• If the seat height is less than 6.86 mm [0.270-inch],
replace the seat.
Use valve spring tester, Part No. 3375182, to check the
intake, exhaust and unloader valve springs. Replace any
springs that do not meet specifications.
NOTE: Cummins Engine Company, Inc. recommends that
new springs be installed.
NOTE: A compressor spring force specifications chart is
shown on Page 4-6.
Installation
Install the wear plate and compression spring in the head
as shown.
Install the exhaust valve on the exhaust valve seat.
Install the o-ring seal on the seat.
Use clean 15W-40 oil to lubricate the o-ring seals.
Use hand pressure to install the exhaust valve assembly
in the head.
NOTE: For SS-296 and ST-676 air compressor models, a
press and air compressor seat installation tool, Part No.
3377415, can be used. Exhaust valve seat puller, Part No.
3822674, can also be used to install the valve seat.
Use new gaskets to install the cylinder head and cover.
Install the flat washers, lockwashers and capscrews.
Section 4 - Compressed Air System Air Compressor, Cylinder Head (4-06)
N14 Page 4-19