Table 2-3. Propulsion System Troubleshooting - Continued.
TEST OR INSPECTION
TRACK FAILS TO MOVE OR MOVES SLUGGISHLY- Continued.
Hydraulic oil can be moderately flammable and can be an irritant to skin, eyes, and respiratory
system. Avoid prolonged exposure. Eye protection and rubber gloves must be worn when
working with hydraulic oil.
The following test requires use of a hydraulic system tester. Install tester in-line at discharge of hydraulic
pump per TM 9-4940-468-14. Make sure ratings of all fittings and hoses used are adequate for maximum
pressures and flows being tested.
There are two discharges located on each hydraulic propulsion pump. One discharge supplies the hydraulic
propulsion motor in forward travel. The other discharge supplies the hydraulic propulsion motor in reverse
travel. Replace or repair faulty hydraulic propulsion pump if either discharge fails the following check.
Connect hydraulic system tester pressure port to (3) and reservoir port to (4). With control handle at
maximum forward position, check flow. Connect hydraulic system tester pressure port to (4) and
reservoir port to (3). With control handle in maximum reverse position, check flow. Check
maximum discharge flow rate of hydraulic propulsion pump. Propulsion pump discharge flow rate
should be no less than 26 +1-1/2 gpm (98 ±5,7 l/min) at 3000 psi (20 685 kPa) with engine at 2640
If discharge is less than 26 +1-1/2 gpm (98 +5,7 l/min) at 3000 psi (20 685 kPa), replace/repair
hydraulic propulsion pump per paragraph 2.30.