SkyTrak 10054 User Manual
Page 301
307
SECTION 10
10054 Hydraulic Testing (S/N 1167 & Before)
Engine Information
Idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,050 ± 50 rpm
Full Speed . . . . . . . . . . . . . . . . . . . . . 2,730 ± 130 rpm
Hydraulic Oil Information
Oil Type - 10W, meets MIL-L-2104C or ISO Grade 46
Capacity - Reservoir . . . . . . . . . . 30.3 gal. (114,7 liter)
Capacity - System . . . . . . . . . . . . 59.5 gal. (225,2 liter)
Note 1: To adjust relief settings or pressure reducing
settings, turn the adjustment screw clockwise to
increase pressure or counterclockwise to decrease
pressure.
*Note 2: On units with S/N 0654 & Before. If the low
brake pressure kit has been installed, as offered in
Service Bulletin STB-2076, issued 5-29-95, refer to test
location
.
The hydraulic oil temperature for the pump flow test
should be between 100° F (38° C) and 120° F (49° C)
(tank hot to the touch) during testing.
Equipment Needed To Perform Tests
From Kit P/N 7118782
Circuit
Gauge
Fittings
4,000 PSI Gauge
(275,6 bar)
#12 Run Tee Swivel Nut
End Reducer #12-8
PD38TX Test Nipple
4,000 PSI Gauge
(275,6 bar)
#8 Run Tee Swivel Nut
PD38TX Test Nipple
1,000 PSI Gauge
(68,9 bar)
#4 Union
PD34BTX Test Nipple
300 PSI Gauge
(20,7 bar)
Connector STR. THD. #4
PD34BTX Test Nipple
1,000 PSI Gauge
(68,9 bar)
#4 Run Tee Swivel Nut
PD34BTX Test Nipple
4,000 PSI Gauge
(275,6 bar)
#6 Elbow 90° Swivel Nut
PD36BTX Test Nipple
TEST
LOCATION
Hydraulic Pump Flow Test
To check flow readings a flow meter capable of measuring 60 GPM (3,8 ltr/sec) and a load valve capable of
6,000 psi (413,4 bar) will be required (not included with kit P/N 7118782).
2,000 psi (137,8 bar) load @ Engine Speed of 2,500 ± 25 rpm — Flow rate should be 39 to 43 GPM (2,5 to 2,7 ltr/sec)
TEST
LOCATION
ADJUST.
LOCATION
COMPONENT
DESCRIPTION
PRESSURE
READINGS
PRESSURE TEST PROCEDURES
Pump Standby
Pressure
550 ± 50 psi
(37,9 ± 3,4 bar)
Loosen load sense line at location
to bleed off pressure
and then retighten line. With engine at idle and all hydraulic
functions in neutral position, check pump standby pressure.
Pump Pressure
Compensator
2,950 ± 50 psi
(203,3 ± 3,4 bar)
With engine at idle fully retract boom extend cylinder and hold.
Check pump maximum pressure.
Priority Valve
Steering Relief
2,500 ± 50 psi
(172,3 ± 3,4 bar)
With engine at idle turn the steering wheel all the way to the left
or right and hold while checking pressure. If pressure is not
correct, adjust or replace the relief valve cartridge in the priority
valve (See Note 1).
Attachment Tilt Port
Relief
3,150 ± 50 psi
(217 ± 3,4 bar)
CONSULT FACTORY
Pressure Reducing
Valve In Pressure
Reducing Valve
Block And
Park Brake Release
425 ± 25 psi
(29,3 ± 1,7 bar)
With engine at idle and park brake released check pressure. If
pressure is not correct, adjust or replace the cartridge in the
pressure reducing valve (See Note 1).
Pressure Reducing
Valve In Axle
Stabilizer Valve
Block
60 ± 10 psi
(4,1 ± 0,7 bar)
With engine at idle and boom in the down position check
pressure. If pressure is not correct, adjust or replace the
cartridge in the axle stabilizer valve (See Note 1).
Relief Check Valve
In Axle Stabilizer
Valve Block
100 psi Minimum
(6,9 bar)
With engine at idle and boom down, while frame tilting to the
left check pressure.
Transmission
De-Clutch
425 ± 25 psi
(29,3 ± 1,7 bar)
With engine at idle and park brake engaged check pressure. If
pressure is not correct, adjust or replace the cartridge in the
pressure reducing valve (See Note 1).
Service Brakes
(*See Note 2)
(S/N 0654 & Before)
425 ± 25 psi
(29,3 ± 1,7 bar)
With engine at idle depress the service brakes and check
pressure. If pressure is not correct, adjust or replace the
cartridge in the pressure reducing valve (See Note 1).
Load Sense
Variable
0 to 2,950 psi
(0 to 203,3 bar)
With engine at idle operate a specific function (Boom, Frame
Tilt, Attachment Tilt, Auxiliary or Steering) and check pressure.
Service Brakes
(S/N 0655 thru 1167)
350 ± 25 psi
(24,1 ± 1,7 bar)
With engine at idle depress the service brakes and check
pressure. If pressure is not correct, recheck pressure reducing
valve pressure.
9
1
2
3
5
4
6
9
7
8
1
N/A
7
N/A
2
2
N/A
N/A
3
3
4
4
N/A
5
5
6
6
7
N/A
9
N/A
Rev. 10/97