Hydraulic pump flow test hydraulic testing – SkyTrak 6036 Service Manual User Manual

Page 259

6036/6036T S/N 9B0500 thru 14833

Section 9

Hydraulic System

Hydraulic Pump Flow Test

HYDRAULIC TESTING

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 ....................... 24 gal. (90,8 liter)
Capacity - System ......................... 38 gal. (143,8 liter)

Note: To adjust relief settings or pressure reducing
settings, turn the adjustment screw clockwise to
increase pressure or counterclockwise to decrease
pressure.

TEST

LOCATION

ADJUST.

LOCATION

COMPONENT

DESCRIPTION

PRESSURE

READINGS

PRESSURE TEST PROCEDURES

N/A

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.

With engine at idle. Check pressure. If pressure is not correct, adjust
or replace the sequence valve cartridge (See Note).

With engine at full throttle. Turn steering wheel to full turn any direction and
hold. Check pressure. If pressure is not correct, adjust or replace
the relief cartridge.

With engine at full throttle. Move joystick fully into boom lower function
until function has reached a stall condition. Hold joystick in stall condition
and check pressure. If pressure is not correct, adjust or replace the relief
cartridge (See Note).

CONSULT FACTORY

With engine at idle. Move attachment tilt joystick to the function to be
tested until the function has reached a stall condition. Hold function in
the stall condition and check pressure. If pressure is not correct, adjust
or replace the relief cartridge (See Note).

CONSULT FACTORY

With engine at idle. Frame tilt to the left until the cylinder reaches the stall
condition and check pressure. If pressure is not correct, adjust or replace
the relief cartridge (See Note). Repeat for frame tilting to the right.

With engine at idle. Switch park lock to the disengaged position. Check
pressure. If pressure does not reach minimum, verify both the sequence
valve and pressure reducing valve pressures. If both pressures are correct,
check park lock solenoid. If solenoid is functioning properly, check park
lock switch.

With engine at idle. Depress brake pedal and hold. If pressure does not
reach minimum, verify sequence valve pressure. If sequence pressure is
correct, verify pressure reducing valve pressure. If pressure reducing
pressure is correct, replace brake valve. Bleed brakes.

With engine at idle and emergency brake engaged check pressure. If
pressure is not correct, adjust or replace the relief cartridge (See Note).

Sequence Valve

Steering Relief

Main Control
Valve Relief

Hoist Port Relief

Extend Port Relief

Retract Port Relief

Secondary Control
Main Valve Relief

Attachment Tilt Port
Relief - Forward

Attachment Tilt Port
Relief - Backward

Frame Tilt Port Relief
Left & Right

Pressure Reducing
Valve And
Park Lock Valve

Brake Valve
(Service Brake)

Trans. De-Clutch

(s/n 1179 & After Only)
* See Below

N/A

*Some units prior to s/n 1179 may be equipped with Trans. De-Clutch.

Circuit

Gauge

Fittings

4,000 PSI Gauge

#8 Run Tee Swivel Nut

(275,6 bar)

PD38TX Test Nipple

4,000 PSI Gauge

#12 Run Tee Swivel Nut

(275,6 bar)

PD38TX Test Nipple

1,000 PSI Gauge

#4 Union

(68,9 bar)

PD34BTX Test Nipple

1,000 PSI Gauge

#4 Run Tee Swivel Nut

(68,9 bar)

PD34BTX Test Nipple

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 14 to 16 GPM (0,9 to 1,0 ltr/sec)

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)

Equipment Needed To Perform Tests - From Kit P/N 7118782

610 - 660 psi

(42 - 45,5 bar)

2,850 ± 150 psi

(196,4 ± 10,3 bar)

2,700 -100/+150 psi
(186 -6,9/+10,3 bar)

2,850±50 psi (196,4±3,4 bar)

2,700 -100/+150 psi
(186 -6,9/+10,3 bar)

3,250 ± 50 psi

(224 ± 3,4 bar)

3,250 ± 50 psi

(224 ± 3,4 bar)

1,300 ± 50 psi

(89,6 ± 3,4)

525 ± 25 psi

(36,2 ± 1,7 bar)

525 ± 25 psi

(36,2 ± 1,7 bar)

525 ± 25 psi

(36,2 ± 1,7 bar)

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