Table 2-5. Screed Lift System Troubleshooting - Continued.
TEST OR INSPECTION
AUXILIARY HYDRAULIC SUPPLY TO VIBRATION AND CYLINDER CIRCUITS FAULTY.
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.
Open right access door per TM 5-3895-373-10. Remove right access cover per TM 5-3895-373-10.
With paving machine off per TM 5-3895-373-10, check right hand auxiliary hydraulic system suction
lines at (1) using hand pump per TM 9-4940-468-14.
Replace or repair components (auxiliary hydraulic system suction hoses, lines, and fittings per
paragraph 2.54, hydraulic reservoir components per paragraph 2.53) as necessary.
The following tests requires use of a hydraulic system tester. Install tester in-line at flow test point
indicated by each individual test per TM 9-4940-468-14. Make sure ratings of all fittings and hoses
used are adequate for maximum pressures and flows being tested.
Install hydraulic system tester for flow test at port (2) per TM 9-4940-468-14. Check flow at right
hand auxiliary hydraulic pump discharge port (2). Measure flow rate at 2475 ±25 psi (17 066 ±172
kPa) with engine at 2640 :40 rpm.
If flow rate is less than 5 gpm (19 l/min) at 2475 ±25 psi (17 066 ±172 kPa), replace/repair right hand auxiliary hydraulic
pump per paragraph 2.42.
If flow rate is at least 5 gpm (19 l/min) at 2475 ±25 psi (17 066 + 172 kPa), replace valve and
cylinder flow divider per paragraph 2.55 and repair per paragraph 2.49.
Disconnect hydraulic system tester per TM 9-4940-468-14. Reconnect all hydraulic lines. Install
right access cover per TM 5-3895-373-10. Close right access door per TM 5-3895-373-10.