RING-THRUST 6T4971 - Caterpillar

Remove Camshaft Housings
preparatory steps: a) remove valve coverb) remove fuel filter housing and bracket (right side only)c) remove primary fuel filter (right side only)1. Rotate the crankshaft to top dead center compression stroke No. 1 piston. See LOCATING TOP DEAD CENTER COMPRESSION POSITION FOR NO. 1 PISTON in TESTING AND ADJUSTING.2. Disconnect the glow plug wiring harness from the glow plugs and camshaft housing. Remove the glow plug wiring harness and mounting bolts. 3. Remove the inner fuel injection lines (1). Disconnect the outer fuel injection lines from camshaft housing and fuel injection pump housing. Remove all outer fuel injection line hold-down clamp mounting bolts. Pull the other fuel injection lines away from camshaft housing.4. To remove right side camshaft housing only, remove right side turbocharger lubrication line (2). Disconnect left turbocharger lubrication line (3) from turbocharger and from "T" fitting (4). Remove the "T" fitting. Disconnect the air compressor air supply line (5) from air compressor, and swing line clear of camshaft housing. 5. Remove the camshaft housing end cover. Remove the two camshaft housing mounting bolts (6), nuts (7) and locks.6. Remove the remaining camshaft housing-to-cylinder head mounting bolts.7. Install two 3/8"-16NC forged eyebolts in camshaft housing. Attach a hoist and remove the camshaft housing-weight 160 lbs. (73 kg).Install Camshaft Housings
1. Adjust all valve lash adjustment screws to obtain maximum valve clearance.2. Align the phasing gear timing marks and install the camshaft timing pin in inlet camshaft bearing journal.3. Check to be sure that crankshaft is at TDC compression position No. 1 piston and timing bolt is installed in flywheel. The crankshaft will also 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 pin for the opposite camshaft housing will drop into inlet camshaft bearing journal (if housing has not been disturbed).
If above procedure relating to valve lash, camshaft timing marks and crankshaft position is not followed, damage to the engine can result.
4. Attach hoist and position camshaft housing on engine making sure that exhaust camshaft gear and drive gear are meshed. Install camshaft housing retaining bolts, nuts and locks. Install camshaft housing end cover.5. After installing right side camshaft housing only, connect air supply line to air compressor. Install turbocharger lubrication line "T" fitting. Connect left turbocharger lubrication line to fitting and to turbocharger. Install right turbocharger lubrication line.6. Connect outer fuel injection lines and install clamp mounting bolts. Install inner fuel injection lines. Tighten all line retaining nuts to 30 5 lb. ft. (4,1 0,7 mkg).7. Install glow plug wiring harness and mounting bolts. Connect wiring to glow plugs and housing. Remove all timing pins from their timing slots and install them in their respective storage positions.concluding steps: a) adjust valve clearanceb) install valve coversc) install fuel filter housing and bracket (right side only)d) install primary fuel filter (right side only)