TM 5-3805-280-24-1
Tests
CYLINDER DRIFT TEST--BOOM, ARM, AND
BUCKET
SPECIFICATIONS
50 5C (120 10F)
Oil Temperature
Engine in Standard Mode Speed
Off
Arm Length
2.96 (9 ft 9 in.)
1.0 m3 (1.38 yd3)
Bucket Capacity
Bucket Load Weight
1315 kg (2900 lb)
Arm Cylinder Length
50 mm (2.00 in.) approximate
extension
Bucket Cylinder Length
50 mm (2.00 in.) approximate
retraction
Boom Cylinder Height
Bucket pivot pin at the same
height as boom-to-main frame pin
Engine Speed
Off
Arm Cylinder Drift
20 mm (13/16 in.) maximum
allowable for 5 minutes
Bucket Cylinder Drift
20 mm (13/16 in.) maximum
allowable for 5 minutes
Boom Cylinder Drift
20 mm (13/16 in.) maximum
allowable for 5 minutes
Bottom of Bucket to Ground Drift
150 mm (6 in.) maximum
allowable for 5 minutes
SERVICE EQUIPMENT AND TOOLS
9025
JT05800 Digital Thermometer
25
126
Tape Measure
Procedure is used to check the leakage past the cylinder
piston seals, control valve spools, circuit relief valves,
boom reduced leakage valve, and arm reduced leakage
valve.
1. Install the temperature probe on the hydraulic
tank-to-pump suction line. (See JT05800 Digital
Thermometer Installation in this group.)
2. Heat hydraulic oil to the specified temperature. (See
Hydraulic System Warm-Up Procedure in this group.)
Oil--Specification
Temperature ........................................................... 50 5C (120 10F)
Continued on next page
TX,9025,GG2665
1909MAY971/3
6-257
