Valve lifters and push rods should be kept in order so they can be re-installed in their original position. The push rods must be installed with painted end up. This is necessary as the premium ball is located on the upper end only.
1. Remove rocker arm covers.
2. Remove rocker arms.
3. Remove guide clamps and guide plates. It may be necessary to use mechanical fingers to remove the guide plates.
4. Remove lifters using Tool J-29834 and a magnet through access holes in cylinder head.
• DISASSEMBLY (Figure 2-8)
1. Remove the retainer ring with a small screwdriver.
2. Remove push-rod seat and oil metering valve.
3. Remove plunger and plunger spring.
4. Remove check valve retainer from plunger, then remove valve and spring.
CLEANING AND INSPECTION
After lifters are disassembled, all parts should be cleaned in clean solvent. A small particle of foreign material under the check valve will cause malfunctioning of the lifter. Close inspection should be made for nicks, burrs or scoring of parts. If either the roller body or plunger is defective, replace with a new lifter assembly.
ROLLER LIFTER INSPECTION
1. Roller should rotate freely, but without excessive play.
2. Check for missing or broken needle bearings.
3. Roller should be free of pits or roughness. If present, check camshaft for similar condition. If pits or roughness are evident replace the lifter and camshaft.
LIFTER ASSEMBLY
1. Assemble ball check spring and retainer into plunger, (Figure 2-6). Make sure retainer flange is pressed tight against bottom of recess in plunger.
2. Install plunger spring over check retainer.
3. Hold plunger with spring up and insert into lifter body. Hold plunger vertically to prevent cocking spring.
4. Assemble oil metering valve and push rod seat and seat retaining ring in groove.
Lifters must be assembled while submerged in kerosene or diesel fuel and leak-down tested before placing into service.
INSTALLATION
Prime new lifters by working lifter plunger while submerged in new kerosene or diesel fuel. Lifter could be damaged if dry when starting engine.
Coat the roller and bearings of lifter with 1052365 lubricant or equivalent.
1. Install the lifters into the original position in the cylinder block.
2. Install valve lifter guide plate.
3. Install guide plate clamp. Crankshaft must be manually rotated 720° after assembly of lifter guide plate clamp to insure free movement of lifters in guide plates.
• PUSHROD
The pushrods have a different degree of hardness at each end. A paint mark at the hard end identifies it. The reason for the additional hardness on the rocker arm end, is because the lifter no longer rotates and consequently neither does the pushrod increasing wear spots. The pushrods could be installed the wrong way, so mark the top of the pushrods as soon as you remove them from the engine.
