TM 5-3805-281-24-1
Tests
CYLINDER DRIFT TEST--BOOM, ARM, AND BUCKET
SPECIFICATIONS
1. Install the temperature probe on the hydraulic
50 5C (120 10F)
tank-to-pump suction line. (See JT05800 Digital
Hydraulic Oil Temperature
Thermometer Installation in this group.)
Arm Length
3.2 m (10 ft 6 in.)
1.76 m3 (2.3 yd3)
Bucket Capacity
2. Heat hydraulic oil to the specified temperature. (See
Bucket Load Weight
2190 kg (4830 lb) approximate
Hydraulic System Warm-Up Procedure in this
Arm Cylinder Length
50 mm (2.00 in.) approximate
group.)
extension
Bucket Cylinder Length
50 mm (2.00 in.) approximate
Hydraulic Oil--Specification
retraction
Temperature .................................................... 50 5C (120 10F)
Boom Cylinders Height
Bucket pivot pin at the same
height as boom-to-main frame
pin
3. Fill the bucket to get the specified bucket load with
the standard arm and bucket.
Engine Speed
Off
Boom Cylinder Drift
20 mm (13/16 in.) maximum
Arm--Specification
allowable for 5 minutes
Arm Cylinder Drift
30 mm (1-3/16 in.) maximum
Length ...................................................................... 3.2 m (10 ft 6 in.)
allowable for 5 minutes
Bucket Cylinder Drift
20 mm (13/16 in.) maximum
Bucket--Specification
allowable for 5 minutes
Capacity .................................................................... 1.76 m3 (2.3 yd3)
Bottom of Bucket to Ground
150 mm (6 in.) maximum
Drift
allowable for 5 minutes
Bucket Load--Specification
ESSENTIAL TOOLS
Weight................................................. 2190 kg (4830 lb) approximate
JT05800 Digital Thermometer
9025
Tape Measure
25
134
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.
Continued on next page
CED,TX08227,3147
1930MAY981/2
