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LIFT VALVE TEST (See Figure 8J-10)
NOTE
A pump flow and selector valve test should be
performed before proceeding with a lift valve
test.
21. At the connector manifold, disconnect line 4 from
port 1 and line 2 from port 3.
22. Completely open the flowmeter load valve.
23. Set the brake, start the engine and advance the
throttle to 3900 engine RPM.
24. Push lift valve lever forward into the lower position
and hold.
25. Slowly close the flowmeter load valve until 1800
psi (12411 kPa) is obtained, read/record gpm flow.
26. Subtract flow in Step 25 from flow in Step 17.
Example:
3.0 gpm (11.36 lpm), Step 17 @ 3900 engine RPM
3.0 gpm (11.36 lpm), Step 25
0.0 gpm (0.0 lpm) leakage
•
If leakage is 1/2 gpm (1.89 lpm) or less, valve is
okay, proceed with Step 27.
•
If leakage is 1/2 to 1 gpm (1.89 to 3.78 lpm), the
valve is marginal.
•
More than 1 gpm (3.78 lpm) leakage will notice-
ably reduce performance. The valve may have
to be replaced.
27. Continue closing flowmeter load valve until flow
drops off and pressure stays constant.
•
Relief set at 2000 psi ± 10% (12411 to 15169
kPa), relief is okay, proceed with Step 27.
•
Relief does not open in specified range, pro-
ceed with Step “a” .
a. Remove the acorn nut from side of valve.
b. Turn screw 1/8 turn, clockwise (CW) increases
pressure or counterclockwise (CCW) to
decrease pressure. Replace acorn nut.
c. Set the brake, start the engine and advance
the throttle to 3900 engine RPM.
d. Push lift valve lever forward into the lower posi-
tion and hold.
e. Slowly close the flowmeter load valve until
1800 psi (12411 kPa) is obtained, read/record
gpm flow.
•
Relief should be set at 2000 psi ± 10%
(12411 to 15169 kPa). Repeat Steps 27a
and 27b until correct pressure is obtained.
•
If pressure can not be obtained, valve may
be faulty, replace.
28. Open tester load valve.
29. Pull lift valve lever rearward into the lift position
and hold.
30. Slowly close the flowmeter load valve until 1800
psi (12411 kPa) is obtained.
31. Subtract flow in Step 30 from flow in Step 17.
Example:
3.0 gpm (11.36 lpm), Step 17 @ 3900 engine RPM
3.0 gpm (11.36 lpm), Step 30
0.0 gpm (0.0 lpm) leakage
•
If leakage is 1/2 gpm (1.89 lpm) or less, valve is
okay, proceed with Step 32.
•
If leakage is 1/2 to 1 gpm (1.89 to 3.78 lpm), the
valve is marginal.
•
More than 1 gpm (3.78 lpm) leakage will notice-
ably reduce performance. The valve may have
to be replaced.
32. Open tester load valve and shut down the engine.
HYDRAULICS
SECTION 8J. INSTRUMENT TEST
8J-15
8J
!
CAUTION
DO NOT exceed 2500 psi (17237 kPa) during
this test.
Содержание TURF-TRUCKSTER
Страница 31: ...ENGINE SECTION 3D DIESEL ENGINE 3D 3 3D Figure 3D 2 Radiator and Cooling System Repair...
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Страница 54: ...DRIVE TRAIN SECTION 4C DRIVE SHAFT 4C 3 4C Figure 4C 3 Drive Shaft Disassembly and Reassembly...
Страница 102: ...DRIVE TRAIN SECTION 4I REAR AXLE 4I 4 Figure 4I 4 Axles and Axle Housings...
Страница 107: ...DRIVE TRAIN SECTION 4I REAR AXLE 4I 9 4I Figure 4I 11 Auxiliary Transmission Disassembly...
Страница 110: ...DRIVE TRAIN SECTION 4I REAR AXLE 4I 12 Figure 4I 13 Auxiliary Transmission Reassembly...
Страница 112: ...DRIVE TRAIN SECTION 4I REAR AXLE 4I 14 Figure 4I 14 Differential and Axle Assembly Installation...
Страница 124: ...BRAKE SYSTEM SECTION 5E MASTER CYLINDER 5E 2 Figure 5E 2 Master Cylinder Connections...
Страница 131: ...STEERING SECTION 6C STEERING SYSTEM 6C 4 Figure 6C 4 Steering Column...
Страница 137: ...STEERING SECTION 6D STEERING GEAR 6D 4 Figure 6D 5 Rack Piston...
Страница 143: ...STEERING SECTION 6E STEERING PUMP 6E 2 Figure 6E 2 Steering Pump Repair...
Страница 163: ...HYDRAULICS SECTION 8G BOX CYLINDER 8G 2 Figure 8G 2 Seal Kit Installation...
Страница 168: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 3 8J Figure 8J 2 Standard Hydraulic System Pump Flow Test...
Страница 170: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 5 8J Figure 8J 3 Selector Valve Test Steps 13 to 20...
Страница 171: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 6 Figure 8J 4 Selector Valve Test Steps 21 to 29...
Страница 173: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 8 Figure 8J 5 Lift Valve Test Steps 30 to 36...
Страница 174: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 9 8J Figure 8J 6 Lift Valve Test Steps 37 to 41...
Страница 176: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 11 8J Figure 8J 7 Cylinder Test...
Страница 178: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 13 8J Figure 8J 8 Pump Section 1 Flow Test...
Страница 179: ...HYDRAULICS SECTION 8J INSTRUMENT TEST Figure 8J 9 Bottom Selector Valve Test 8J 14...
Страница 181: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 16 Figure 8J 10 Lift Valve Test...
Страница 183: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 18 Figure 8J 11 Cylinder Test...
Страница 185: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 20 Figure 8J 12 Pump Section 2 Flow Test...
Страница 186: ...HYDRAULICS SECTION 8J INSTRUMENT TEST 8J 21 8J Figure 8J 13 Bottom Selector Test...
Страница 251: ...ATTACHMENTS SECTION 12C MECHANICAL PTO 12C 2 Figure 12C 3 Mechanical PTO Exploded View...
Страница 259: ...MISCELLANEOUS SECTION 14A PRECAUTION DECAL LOCATIONS 14A 1 14A PRECAUTION DECAL LOCATIONS...
Страница 261: ...MISCELLANEOUS SECTION 14B CONVERSION CHARTS 14B 1 14B MILLIMETERS TO DECIMALS...
Страница 262: ...MISCELLANEOUS SECTION 14B CONVERSION CHARTS 14B 2 DECIMALS TO MILLIMETERS FRACTIONS TO DECIMALS TO MILLIMETERS...