SkyTrak 3606 Service Manual - Manual (Page 201)

Hydraulic System
9-7
Engine Information
Idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,050 ± 50 rpm
Full Speed . . . . . . . . . . . . . . . . . . . . . . 2,750 ± 50 rpm
Hydraulic Oil Information
Oil Type - 10W, meets MIL-L-2104C or ISO Grade 46
Capacity - Reservoir . . . . . . . . . . .32.2 gal. (114,7 liter)
Capacity - System . . . . . . . . . . . .59.5 gal. (225,2 liter)
Note: To adjust relief settings or pressure reducing
settings, turn the adjustment screw clockwise to
increase pressure or counterclockwise to decrease
pressure.
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 Hydraulic Diagnostic Test Kit
Circuit Gauge Fittings
4,000 PSI Gauge
(275,6 bar) Unit equipped with fittings from factory.
1,000 PSI Gauge
(68,9 bar)
1,000 PSI Gauge
(68,9 bar)
1,000 PSI Gauge
(68,9 bar)
4,000 PSI Gauge
(275,6 bar) Requires a male or female quick-
disconnect coupler with test fitting.
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 Hydraulic Diagnostic Test Kit).
2,000 psi (137,8 bar) load @ Engine Speed of 2,500 ± 25 rpm — Flow rate should be 28 to 32 GPM (1,8 to 2,0 ltr/sec)
STANDBY PRESSURE 250 to 350 psi (17,25 to 24,15 bar) at idle.
TEST
LOCATION
ADJUST.
LOCATION
COMPONENT
DESCRIPTION
PRESSURE
READINGS
PRESSURE TEST PROCEDURES
Unloader Valve Main System Relief
3,500 ± 100 psi
(241,3 ± 7 bar)
With engine at FULL throttle, use control lever (“joystick”) to
lower boom fully. Hold over relief. Check readings. If incorrect,
adjust or replace cartridge.
Main Control Valve Extend Base
Port Relief
3,200 ± 100 psi
(220,6 ± 7 bar)
With engine at FULL throttle, use control lever (“joystick”) to
extend boom fully. Hold over relief. Check readings. If incorrect,
adjust or replace cartridge.
N/A
Attachment Tilt
Relief/FORWARD or
REARWARD 3,700 ± 100 psi
(255 ± 7 bar)
CONSULT FACTORY
Auxiliary Manifold Steering Relief
2,500 ± 100 psi
(172,3 ± 7 bar)
With engine at FULL throttle, turn the steering wheel all the way
to one direction and hold while checking pressure. If pressure
is not correct, adjust or replace the pressure-reducing cartridge.
N/A
Auxiliary Manifold Park Brake Release
450 - 700 psi
(31,0 - 48,2 bar)
With engine at idle, switch Park Brake to disengaged position
with secondary function held over relief. Check pressure.
Auxiliary Manifold Pilot Pressure
550 ± 100 psi
(37,9 ± 7 bar)
With engine at FULL throttle, move joystick to boom retract position.
Hold joystick to over relief and check pressure. If pressure is
not correct, adjust or replace the cartridge in the auxiliary manifold.
N/A
Brake Valve
(Manual Brake
Pressure) 300 psi minimum
(20,7 bar)
With engine OFF, depress and hold brake pedal. If pressure is
incorrect, check for external leaks. If no leaks are found, refer
to service manual brake system information.
N/A
Brake Valve
(Service Brake
Pressure) 400 psi minimum
(27,6 bar)
With engine at idle, depress and hold brake pedal. DO NOT
turn steering wheel. Check pressure. If pressure is not correct,
consult service manual.
Auxiliary
3,500 ± 100 psi
(241,3 ± 7 bar)
With engine at full throttle, auxiliary button on joystick
depressed and held, move joystick left or right. Hold joystick to
over relief and check pressure. If pressure is not correct, check
unloader pressure per
. If is ok check port reliefs in
aux. valve (consult Factory).
1 2 3
4
5
6
7
1
2
2 2a
2 2b
2
3 3a
4
5 4a
6
6
7
2 2
3606 HYDRAULIC TESTING
Model 3606 • Origin 10/99