ROCKER ARM AS 2785112 - Caterpillar

Specifications
Table 1
Valve Lash Setting: Engine Stopped
Valves Gauge Dimension
Inlet 0.50 0.08 mm (0.020 0.003 inch)
Exhaust 1.00 0.08 mm (0.040 0.003 inch) Introduction
Use this procedure for adjusting the valve lash.Required Tools
Table 2
Required Tools
Part Number Part Name Qty
147-2060 Wrench 1
147-2059 Torque Wrench 1
148-7211 Bridge Nut Socket 1
145-5191 Gauge Support 1
147-2056 Dial Indicator 1
147-5536 Indicator Contact Point 1
147-2057 Indicator Contact Point 1
147-2058 Indicator Extension 1
147-5537 Dial Indicator (Not Shown) 1 Note: The 145-5191 Gauge Support (4), the 147-2057 Indicator Contact Point (7), the 147-2058 Indicator Extension (8), and the 147-5536 Indicator Contact Point (6) are included in the 147-5482 Valve Lash Gauge Group.Note: The 147-2056 Dial Indicator or the 147-5537 Dial Indicator (Metric, not shown) can be used with the 147-5482 Valve Lash Gauge Group.Valve Lash Adjust Preparation
Ensure that the number 1 piston is at the top center position. Refer to Testing and Adjusting, "Finding the Top Center Position for the No. 1 Piston".
The number 1 piston must be at the top center position of the correct stroke. Adjust the valves according to the chart: Refer to Testing and Adjusting, "Crankshaft Positions for Fuel Injector Adjustment and Valve Lash Setting".Note: Tap each rocker arm on the top of the adjustment screw before you make any adjustments. Use a soft hammer. Make sure that the lifter roller is seated against the base circle of the camshaft.Valve Lash Check and Adjust
Illustration 1 g00286365
(1) 145-5191 Gauge Support
(2) 147-2057 Indicator Contact Point
Install the 145-5191 Gauge Support (1). Use the 147-2056 Dial Indicatoror use the 147-5537 Dial Indicator. Use the 147-2057 Indicator Contact Point (2). Install the tool in the rear bolt hole. The rear bolt hole is on the valve cover base.
Illustration 2 g00286366
(3) 147-2060 Wrench
(4) 147-2059 Torque Wrench
Illustration 3 g00286367
(3) 147-2060 Wrench
(4) 147-2059 Torque Wrench
Move the rocker assembly upward and move the rocker arm assembly downward. Move the rocker assembly several times. The oil film is removed to get a true zero reading on the dial indicator. Use the 147-2060 Wrench (3) and use the 147-2059 Torque Wrench (4). Install the socket wrench and install the torque wrench on the nut of the rocker arm. Apply upward pressure to the front of the rocker assembly. Set the dial indicator to zero. The weight of the torque wrench (4) allows the valve lash to be read. Do not apply any pressure on the torque wrench.
Loosen the locknut. The locknut is on the adjustment screw of the pushrod. Turn the adjustment screw until the valve lash is set to specifications. Tighten the nut for the adjustment screw to 70 15 N m (50 11 lb ft). The 147-2059 Torque Wrench is preset to the torque that is required. Check the adjustment again.