Hydraulic System Pressure Tests - Allied Systems H6H Service Manual

Service

Hydraulic System Pressure Tests

TEST ITEM CHECK PORT
Pilot Supply Tractor Pilot
Test Port
Counter- Motor Port B
balance Valve
Motor Supply Motor Ports A
& B
Brake BR: Brake
Brake Valve BR: Brake
RI: LINE-IN
FREESPOOL FS:
FREESPOOL
BO: BRAKE-
OFF
BRAKE-OFF BO: BRAKE-
OFF
LINE-IN RI: LINE-IN
LINE-OUT RO: LINE-OUT
TRACTOR CODE
C71 CAT D6T
C81/811 CAT D6N
E460 JD 750/850J/K
E460 JD 750/850J/K
K49 Kom D65-16/17
K471 Kom D61-23
K471 Kom D61-23
L41 Liebherr PR724
L41 Liebherr PR724
R40 CNH 1650L
R42 CNH 1650M/2050M
3 - 6
TEST EQUIPMENT
REQUIRED
1000 psi (6895 kPa) Tractor blade
gauge over relief
LINE-OUT
5000 psi (34,474
kPa)
LINE-IN/OUT
5000 psi (34,474
kPa) with brake
pressure port
blocked.
1000 psi (6895 kPa) LINE-IN
gauge
LINE-IN
1000 psi (6895 kPa)
gauge (see Brake
Valve Setting
Procedure)
1000 psi (6895 kPa) FREESPOOL
gauge
BRAKE-OFF
1000 psi (6895 kPa)
gauge
1000 psi (6895 kPa) LINE-IN
gauge
1000 psi (6895 kPa) LINE-OUT
gauge
Figure 3-5 Hydraulic System Pressure Tests
Option Motor Supply Pressure (S) psi
T 2800
T 3600
H 3500
T 3500
T 4050
T 3974
H 5555
T 2900
H 4061
T 2870
T 3000/3625
Figure 3-6 Hydraulic System Pressure Values
CONTROL PRESSURE
POSITION
See Figure 3-6
below for details.
700-1000 psi
(4827 kPa - 6895
kPa)
See Figure 3-6
below for details.
See Figure 3-6
below for details.
See Figure 3-6
below for details.
See Figure 3-6
below for details.
See Figure 3-6
below for details.
See Figure 3-6
below for details.
See Figure 3-6
below for details.
RI start (psi)
140-150
120-140
140-160
140-160
130-150
130-150
80-100
130-150
130-150
120-140
64-84
®
CORRECTIVE
ACTION
Adjust tractor pilot
reducing valve.
See tractor Service
Manual.
Adjust
Counterbalance
Valve.
Adjust Load Sense
Relief Valve.
Check plumbing
for leakage. Check
brake for leakage.
Adjust Brake Valve.
Check plumbing
for leakage. Check
respective solenoid
valves.
Check plumbing
for leakage. Check
solenoid valve.
Check handlever.
Check handlever.
Tractor Pilot (P) psi
420-500
420-500
300-650
300-650
500-580
370-400
370-400
290-350
360-420
420-450
420-450