RING GP-PISTON 1992151 - Caterpillar

Table 1
Required Tools
Part Number Description Qty
9U-7400 Multitach Tool Group 1
Position the machine on level ground.
Stop the engine.
Install 9U-7400 Multitach Tool Group on the engine.
Start the engine.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Read the engine speed display (rpm) on the multitach. Refer to Table 2 for the specifications for engine speed at the desired engine operation.
Table 2
Item Specifications
New Rebuild Service Limit
No load high idle(1) 1880 50 rpm(2) 1680 to 1930 rpm(1)
1980 50 rpm(3) 1780 to 2030 rpm(3)
No load low idle 950 50 rpm 950 100 rpm
Maximum speed with load(4) 1720 to 1800 rpm 1670 rpm(5) 1620 rpm(5)
No load speed(6) 1300 50 rpm 1300 100 rpm
(1) AEC switch in the OFF position
(2) Three seconds after the engine speed dial was placed at position "10"
(3) Engine rpm within three seconds after the engine speed dial was placed at position "10"
(4) Pressure is relieved from both pumps (stall condition).
(5) Minimum rpm
(6) AEC switch in the ON positionNote: A New specification is the performance that can be expected for a new machine. A Rebuild specification is the performance that can be expected after rebuilding the components of a system. Performance beyond the Service Limit is an indication of these problems: improper maintenance or adjustment, component wear and failure.