VALVE 7H3943 - Caterpillar

Remove Right Rear Camshaft Housing
preparatory steps: a) remove valve coversb) remove air cleaner housing (right side)1. Rotate the crankshaft to top center compression stroke No. 1 piston. See LOCATING TOP CENTER COMPRESSION POSITION FOR NO. 1 PISTON in TESTING AND ADJUSTING.2. On Marine engines only, drain engine coolant. Remove sea water pump water outlet line. Remove water cooled exhaust manifold rear water line.3. Disconnect outer fuel injection lines from camshaft housing.4. Remove the glow plug wiring harness. 5. Remove oil line (1). Remove cover retaining nuts, slide cover away from housing. 6. Remove bolts (3), nuts (2) and locks. Slide cover back on housing. 7. Remove bolts (6), lock and retainer. Loosen collar retaining clamps (5). Slide collars forward to separate the camshafts.8. Remove inner fuel injection lines (4). Install plugs or caps on exposed fuel lines and fittings.9. Adjust all valve lash adjustment screws for maximum valve clearance.10. Remove camshaft housing-to-cylinder head retaining bolts.11. Install two 3/8"-16NC forged eyebolts in camshaft housing. Attach a hoist, and remove the camshaft housing-weight 120 lbs. (54 kg.)
To prevent piston and valve interference do not rotate the crankshaft with right rear camshaft housing removed and the right front camshaft housing installed. Damage to the engine may result.
Install Right Rear Camshaft Housing
1. Align the phasing gear timing marks, and install timing pin in the inlet camshaft timing slot.
To prevent piston and valve interference, do not rotate the crankshaft with right rear camshaft housing removed and the right front camshaft housing installed. Also do not rotate crankshaft with left front camshaft housing removed and left rear camshaft housing installed. Damage to the engine may result.
2. Check to be sure that crankshaft is at TC compression position No. 1 piston. The crankshaft will be in this position if: a. The timing pin can be inserted into slot in fuel injection pump camshaft as outlined in FUEL INJECTION PUMP CAMSHAFT TIMING in TESTING AND ADJUSTING.b. The timing pins for the left side camshaft housings can be installed into their timing slots (if housings haven't been disturbed).c. The timing pins for the right front camshaft housing can be installed into their timing slots (if housing hasn't been disturbed).
If above procedure relating to camshaft timing marks, timing pins, and crankshaft position is not followed, damage to the engine may result.
3. Attach a hoist, and position camshaft housing on engine making sure that exhaust camshaft gear and drive gear are meshed. Be sure end cover is positioned on retaining studs before installation of camshaft.4. Install retaining bolts, nuts, and locks. Install end cover retaining nuts. Install oil line. 5. Position collars (1) on the camshafts. Install retainer, lock, and bolts. Tighten collar retaining clamps. 6. Remove plugs or caps and install inner fuel injection lines (2). Connect outer fuel injection lines to camshaft housing. Tighten all fuel line retaining nuts to 30 5 lb. ft. (4,1 0,7 mkg).7. Install glow plug wiring harness, when applicable.8. Remove all timing pins from their timing slots. Install timing pins