DISTRIBUTION SYSTEMS - SECONDARY HYDRAULIC POWER SYSTEM
SECONDARY HYDRAULIC POWER SYSTEM - Flow test (A.12.A -
F.40.A.45)
435, 445, 445CT
Prior operation: Relief valve - Flow test (A.10.A.16 - F.40.A.45) Relief valve - Flow test (H.40.B.16 -
F.40.A.45)Relief valve - Flow test (H.50.C.17 - F.40.A.45)
NOTE:
Both of the loader control valve spools must be in the NEUTRAL position during the following test.
NOTE:
If the auxiliary hydraulic circuit is connected to an attachment using a hydraulic motor, this
fl
ow test does not
apply.
1.
Push down one side of the auxiliary hydraulic
fl
ow
control pedal and adjust the pressure valve on the
fl
owmeter until the pressure gauge indicates 124
bar (1800 psi). Adjust the engine speed to keep the
engine running at 2300 r/min (rpm). Read the
fl
ow
gauge and record the reading as test number 11.
2.
Push down the opposite side of the auxiliary
hydraulic
fl
ow control pedal and adjust the pressure
valve on the
fl
owmeter until the pressure gauge
indicates 124 bar (1800 psi). Adjust the engine
speed to keep the engine running at 2300 r/min
(rpm). Read the
fl
ow gauge and record the reading
as test number 12.
3.
Open the pressure valve completely. Decrease the
engine speed to low idle and stop the engine.
NOTE:
Understanding the results of the tests are outlined
in the steps below.
4.
Refer to
Hydraulic pump - Flow test (A.10.A.20
- F.40.A.45)
If the
fl
ow indication for a circuit was
approximately the same as the
fl
ow indication at the
same pressure in Test Number 1 of the Hydraulic
Pump Flow Test , the circuit is good.
5.
If the
fl
ow indication for a circuit was more than
3.8 L/min (one gpm) less than the
fl
ow indication
at the same pressure in
Hydraulic pump - Flow
test (A.10.A.20 - F.40.A.45)
Test Number 1, there
is leakage in that circuit.
6.
Leakage in the auxiliary circuits can be caused by
any of the following problems:
A. Inadequate control spool travel.
B. Damaged or worn packing in one or both of the
cylinders.
C. Damaged or worn spool or spool bore in the
loader control valve.
7.
If the
fl
ow indication for every circuit tested was
more than 3.8 L/min (one gpm) less than the
fl
ow
indication at the same pressure in test number. 1,
there is leakage at a point common to the entire
system. A probable cause is a damaged or worn
main relief valve or seals.
1 04/05/2005
A.12.A / 4
Summary of Contents for 435
Page 1: ...REPAIR MANUAL 435 445CT 445 6 75491 1 04 05 2005 ...
Page 3: ...INTRODUCTION 6 75491 1 04 05 2005 1 ...
Page 15: ...INTRODUCTION bs04e020_1 4 6 75491 1 04 05 2005 13 ...
Page 16: ...INTRODUCTION bs04e021_1 5 6 75491 1 04 05 2005 14 ...
Page 19: ...REPAIR MANUAL DISTRIBUTION SYSTEMS 435 445CT 445 39702 1 04 05 2005 A ...
Page 86: ...39703 1 04 05 2005 A 10 A 66 ...
Page 104: ...39704 1 04 05 2005 A 12 A 18 ...
Page 126: ...39705 1 04 05 2005 A 16 A 22 ...
Page 127: ...DISTRIBUTION SYSTEMS A ELECTRICAL POWER SYSTEM 30 A 435 445CT 445 39706 1 04 05 2005 A 30 A 1 ...
Page 237: ...DISTRIBUTION SYSTEMS A LIGHTING SYSTEM 40 A 435 445CT 445 39707 1 04 05 2005 A 40 A 1 ...