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 |
800 ± 50 rpm |
800 ± 100 rpm |
Maximum speed with load (4) |
1720 rpm (5) |
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 |
( 6 ) |
AEC switch in the ON position |
Note: 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.