TM 5-3805-281-24-1
Tests
HYDRAULIC PUMP REGULATOR TEST AND ADJUSTMENT--MAXIMUM FLOW
SPECIFICATIONS
Hydraulic Oil--Specification
Track Sag
340--380 mm (13-3/8--15 in.)
Temperature .................................................... 50 5C (120 10F)
50 5C (120 10F)
Hydraulic Oil Temperature
Engine Speed
2050 rpm
5. Run machine as specified.
Work Mode Selector Position
Dig Mode
Engine--Specification
E Mode Switch Position
Off
HP Mode Switch Position
Off
Speed.................................................................................... 2050 rpm
Auto-Idle Switch Position
Off
Work Mode Selector--Specification
Propel Speed Switch Position
Slow Speed (Turtle)
33 2 seconds
Slow Speed Propel With Track
Position ................................................................................. Dig Mode
Raised For Three Revolutions
From A Running Start Cycle
E Mode Switch--Specification
Time
Position ........................................................................................... Off
SERVICE EQUIPMENT AND TOOLS
HP Mode Switch--Specification
JT05801 Clamp-On Electronic Tachometer
JT05800 Digital Thermometer
Position ........................................................................................... Off
Stop Watch
Auto-Idle Switch--Specification
30 mm Combination Wrench
13 mm Combination Wrench
Position ........................................................................................... Off
Flat Blade Screwdriver
Propel Speed Switch--Specification
The purpose of check is to test and adjust the
9025
Position ................................................................ Slow Speed (Turtle)
maximum flow rate of pumps using the cycle time for
25
propel as an indicator of pump flow rate.
108
6. Raise the left track off ground for rear pump or the
right track for front pump.
1. Adjust the track sag for both tracks to specification.
(See procedure in Group 9020-20.)
7. Actuate propel function to full speed. Record the
cycle time for three revolution.
Track--Specification
8. Repeat procedure for other pump. Record the cycle
Sag...................................................... 340--380 mm (13-3/8--15 in.)
time for three revolution.
2. Install a tachometer. (See JT05801 Clamp-On
Electronic Tachometer Installation in this group.)
3. Install the temperature probe on the hydraulic
tank-to-pump suction line. (See JT05800 Digital
Thermometer Installation in this group.)
4. Heat hydraulic oil to the specified temperature. (See
Hydraulic System Warm-Up Procedure in this
group.)
Continued on next page
CED,TX08227,3142
1928MAY981/2
