SkyTrak 6036 Service Manual - Manual (Page 163)

8-11 6036, 6042, 8042, 10042, 10054
Hydraulic System
Test
Location
Hydraulic Pump Flow Test
1
To check flow readings, a flow meter capable of measuring 60 gpm (3,8 liter/sec) and a load
valve capable of 6000 psi (413,4 bar) will be required. — 2000 psi (137,8 bar) load @ Engine
Speed of 2475–2525 rpm—Flow rate should be 48.9 GPM (3 liter/sec)
Test
Location
Adjust.
Location
Component
Description
Pressure
Reading
Pressure Test Procedures
2 A
Pump Standby
Pressure
400–450 psi
(28–31 bar)
With all hydraulic functions in neutral position, park brake
on, engine at high idle (2650 RPM), check pump standby
pressure at main valve pressure tap (location 2)
2 B
Main Pump
Pressure
Check/Adjust
3050–3150 psi
(210–217 bar)
With park brake on, engine at high idle (2560 RPM) fully
retract boom hoist cylinder and hold while checking pump
maximum pressure at main valve pressure tap (location 2)
3 C
Load Sense
Relief Check/
Adjust
System Relief
2900–3100 psi
(200–214 bar)
With park brake on, engine at high idle (2560 RPM) fully
retract boom hoist cylinder and hold while checking load
sense relief pressure tap (location C). If load sense relief
pressure cannot be achieved, refer to Section 8.6.1, d.
“Load Sense Relief Adjustment.”
5 E (PR1)
Secondary
Function
Manifold
Steering Relief
2400–2600 psi
(165–179 bar)
With engine at idle, turn the steering wheel all the way in
one direction. Hold over relief and check pressure. If
pressure is incorrect, adjust or replace the pressure
reducing cartridge.
6 N/A
Secondary
Function
Manifold
Park Brake
Release
500–600 psi
(34–41 bar)
With engine at the idle and no hydraulic functions
operated, disengage the park brake, check pressure.
This is not an adjustment.
7 F (PR2)
Secondary
Function
Manifold
Park Brake
Pressure
500–600 psi
(34–41 bar)
With engine at idle and park brake released, turn the
steering wheel all the way in one direction. Hold over relief
and check pressure. If pressure is incorrect, adjust or
replace the pressure reducing cartridge in the secondary
function manifold.
8 N/A
Brake Valve
(Manual Brake
Pressure)
400 psi
(28 bar)
minimum
With engine OFF, pump brake pedal twice. If pressure is
incorrect, check for external leaks. If no leaks are found,
refer to Section 8.7.5, “Brake Bleeding.”
8 N/A
Brake Valve
(Service Brake
Pressure)
1000 psi
(69 bar)
minimum
With engine at idle, depress and hold brake pedal. DO NOT
turn steering wheel.Check pressure. If pressure is
incorrect, refer to Section 8.7.5, “Brake Bleeding.”
9 D
Auxiliary
Hydraulics
3000 psi
(207 bar)
With engine at low idle, move auxiliary control lever left or
right. Hold control lever over relief and check pressure. If
pressure is incorrect, check main relief per location 3.
10 N/A
Stabilizer
Cylinder
75–150 psi
(5,2–10,3 bar)
With the engine at idle, check the pressure of the cylinder.