* Soak rockers in kerosene to disolve all preserve. Blow all oil pasasges with dry air. Then immerse rockers in engine oil for 30 minutes to ensure oil penetrates to bearings and roller shafts. .

* Back up all set screws on polylocks. Turn trunion shaft flat face up and hand tight polylock onto rocker studs. Make sure the push rod is properly seated.

* Make sure replace all push rod with correct length in response to rocker ratio.

* Adjustment of valve lash one cylinder at each time;

For intake valve of hydraulic & mechnical Lifters:

Crank engine until exhaust push rod begins to open valve. Tight polylock at intake rocker until feel a slight resistance on the push rod from your finger tip spinning. Continue tight polylock half of a turn more for an ideal pre-load.

For exhaust valve:same procedure as intake valve.

* Make sure a proper clearacne on:

0.030" between rocker and spring retainer.

0.060" between reatiner and valve seal.

* Tight and secure polylock against rocker stud and set screw on polylock.

* Spray adequate lube on valve train system for engine break-in.

* Hand crank engine to ensure all rockers run freely and the polylocks are not hitting on the up slot.

* Make sure the roller tips are properly sat on the center of valve top.

* Start the engine at low speed and make sure no knocking sound from cylinder head.

TECH SUPPORT
CAT POWER ENGINE PARTS, INC.