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OPTIONAL HIGH/LOW SYSTEM
PUMP FLOW TEST SECTION 1 (See Figure 8J-8)
1. At the pump, remove the outlet line from pump
section 1. Plug line.
2. Install a tee to pump outlet port.
3. Connect flowmeter “IN” port line to the pump tee.
Cap remaining port of tee.
4. Install a 1/2-14 pipe to 7/8-14, 37° flare adapter
(Aeroquip #2021-8-10 or equivalent) in the
hydraulic tank fill port.
5. Connect the flowmeter “OUT” line to the adapter.
6. Completely open the flowmeter load valve.
7. Set the brake, start the engine and advance the
throttle to 3900 engine RPM.
8. Read/record no load flow. No load flow should be
5.0 gpm (18.93 lpm).
•
If flow is in specified range, proceed with Step 9.
•
If flow is lower than specified, engine RPM not
correct or pump is faulty.
9. Slowly close the flowmeter load valve until 1800
psi (12411 kPa) is obtained. Record gpm flow.
10. Subtract flow in Step 9 from flow in Step 8.
Example:
5.0 gpm (18.93 lpm), Step 8 @ 3900 engine RPM
5.0 gpm (18.93 lpm), Step 9
0.0 gpm (0.0 lpm) leakage
•
If leakage is 1/2 gpm (1.89 lpm) or less, pump is
okay, proceed with Step 11.
•
If leakage is 1/2 to 1-1/2 gpm (1.89 to 5.68 lpm),
the pump is marginal.
•
More than 1-1/2 gpm (5.68 lpm) leakage will
noticeably reduce performance. The pump may
have to be repaired or replaced (Section 8D).
11. Open tester load valve and shut down engine.
Proceed with Step 12, “BOTTOM SELECTOR
VALVE TEST”.
BOTTOM SELECTOR VALVE TEST
(See Figure 8J-9)
NOTE
A pump test should be performed before pro-
ceeding with a selector valve test.
12. Reconnect pump section 1 outlet line to tee.
13. At bottom selector valve, disconnect hose from
inside bottom port, plug line and cap valve port.
14. Push selector valve knob down.
15. Completely open the flowmeter load valve.
16. Set the brake, start the engine and advance the
throttle to 3900 engine RPM.
17. Slowly close the flowmeter load valve until 1800
psi (12411 kPa) is obtained. Record flow.
18. Subtract flow in Step 17 from flow in Step 9.
Example:
4.5 gpm (17.03 lpm), Step 9 @ 3900 engine RPM
4.5 gpm (17.03 lpm), Step 17
0.0 gpm (0.0 lpm) leakage
•
If leakage is 1/2 gpm (1.89 lpm) or less, valve is
okay, proceed to Step 19.
•
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.
19. Completely open tester load valve and shut down
engine.
20. Reconnect hose to bottom port of selector valve.
Proceed with Step 21, “LIFT VALVE TEST”.
HYDRAULICS
SECTION 8J. INSTRUMENT TEST
8J-12
Содержание TURF-TRUCKSTER
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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...
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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...