RETAINER 2718529 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.Before proceeding with 184 Day FRA inspection maintenance, first perform 92 Day FRA Inspection, 250 Service Hour and Daily maintenance requirements.Engine Valve Lash
Check/Adjust
All valve lash adjustments after the Initial 92 Day FRA Inspection Interval are to be performed at Every 184 Day Inspection Interval.The crankshaft/camshaft timing must be checked and a bridge adjustment made before making a valve clearance adjustment.Use the following sequence to perform this maintenance.
Thoroughly clean the area around the valve mechanism covers to prevent the entry of foreign material into the top of cylinder head, unit injector and valve mechanism. After the covers are removed, place a clean cloth over the unit injector and install protective covers in the openings whenever fuel lines are disconnected to prevent entry of airborne dirt, debris and abrasive particles, which may cause unit injector seizures.Failure to observe these precautions can result in unit injector seizures.
Cam, bridge, valve and unit injector checks/adjustments can be made with only two turns of the crankshaft. The first turn is to obtain Top Center (TC) of No. 1 piston on the compression stroke. The cam timing as well as one-half of all bridges, valves, and unit injectors can be checked at this setting.The second turn of the crankshaft is to obtain TC of no. 1 piston on the exhaust stroke. All remaining bridges, valves and unit injectors can then be checked.3508 Engine Timing
3512 Engine Timing
3516 Engine Timing
1. Set No. 1 piston to TC Compression stroke and check timing between the camshaft and crankshaft. At No. 1 piston TC Compression, both rocker arms should be loose and the unit injector should be partially depressed.2. Perform valve clearance check. If valve clearance is within specifications, no adjustment is necessary.3. If adjustment is necessary, first adjust the bridge assembly. Refer to topic Bridge Adjustment in this section. Lubrication is not necessary for correct operation if bridge adjustment is required.4. Check unit injector timing, make adjustments as necessary. Refer to the Service Manual for this procedure.5. Rotate the crankshaft one revolution to set No. 1 piston to TC Exhaust stroke, then repeat steps 1 through 3.6. Conclude by installing all valve mechanism covers.Check Crankshaft/Camshaft Timing
Be sure the engine cannot be started while this maintenance procedure is being performed. To prevent possible injury, do not use the starting motors to turn flywheel and crankshaft. Disconnect battery to starting motor connection.
To perform this and the following maintenance procedures, refer to the Service Manual for this engine.1. Disable the starting system so the engine cannot accidentally start.2. Clean around all valve mechanism covers and remove covers.
The crankshaft and camshaft must be synchronized. If the camshaft timing pin cannot be installed, refer to Camshaft Gear Removal in the Service Manual. Do Not attempt to adjust the valves if the crankshaft and camshaft are not synchronized. Disregard for this notice can result in bent valves.
Bridge Adjustment
Be sure to adjust