F369977-1 INTERLOCK ARM Force
H0700H79A, H0709B79A, H0750H79A, H0756H80F, H0756H81G, H0756H82H, H0757B79E, H0757H75A, H0757H76C, H0757H78D, H0758H80B, H0758H82E, H0759H79A, H0850H79A, H0850H80A, H0850H81C, H0851H79A, H0851X88A, H0853F88B, H0853F89C, H0853F89E, H0853F89F, H0853F89
INTERLOCK

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Compatible models:
H0700H79A
H0709B79A
H0750H79A
H0756H80F
H0756H81G
H0756H82H
H0757B79E
H0757H75A
H0757H76C
H0757H78D
H0758H80B
H0758H82E
H0759H79A
H0850H79A
H0850H80A
H0850H81C
H0851H79A
H0851X88A
H0853F88B
H0853F89C
H0853F89E
H0853F89F
H0853F89G
H0855H79A
H0856A89A
H0856A89H
H0856B80H
H0856C87A
H0856C87B
H0856F84A
H0856F85A
H0856F86A
H0856H82K
H0856L89D
H0856Y89B
H0857B78F
H0857H79G
H0858B80C
H0858B82E
H0858C84H
H0859B79B
H0859H77A
H0859H78A
H0903E91D
H0903F90B
H0903F90C
H0903F91A
H0903F91C
H0906A90A
H0906R83D
H1000H79A
H1004H79A
H1006B80B
H1006B81C
H1007H79A
H1008H80A
H1008H83C
H1057B78H
H1058H82G
H1058V83H
H1059H76D
H1059H77G
H1151H79A
H1154B79A
H1155H79A
H1156H80C
H1156H81D
H1157B79B
H1157H78A
H1158B82E
H1158H80D
H1158H84G
H1159H77A
H1159H78B
H1159H79C
H1209H76F
H1251A88A
H1251A88B
H1251A88C
H1251A89A
H1251A89B
H1251A89C
H1251A89D
H1251A89E
H1251F84A
H1251F86A
H1251F87A
H1251F87B
H1251X85A
H1258H81A
H1400H79A
H1401H79A
H1405H79A
H1406H80C
H1406H81D
H1407B79B
H1407H78A
H1408B80C
H1408H82D
H1408H83E
H1409H78A
H1409H79B
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- GEAR SHIFT LINKAGE » F369977-1
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- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
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- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
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- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
- POWER HEAD » F369977-1
Information:
Introduction
This Special Instruction will describe the cause of oil transfer between the tank for the steering system and the tank for the hoist system. This Special Instruction will also provide instructions for removing components that will permanently prevent the transfer of oil by removing the feature that allows the body to be lowered when the engine is stopped.If you apply this Special Instruction, you will leave the machine without this feature that allows the body to be lowered when the engine is stopped. The feature should be reinstated by using the procedure in Service Magazine, SEPD0703 6 October, "New Procedure for Lowering the Body With the Engine Stopped. Parts Can Be Field Installed".Description of the Problem
In certain operating conditions, there can be a transfer of oil between the tank assembly for the steering system and the tank assembly for the hoist system.This can occur after dumping when the machine is backed up on a grade. If the grade is steep enough and the body does not go over center then the body can move forward slightly at the end of the dump cycle. This movement causes a vacuum in the line that connects the hoist valve to the 179-9223 Check Valve . If this happens the check valve will unseat and oil will be drawn from the steering system hydraulic tank through the 145-8587 Lowering Control Valve . The 145-8587 Lowering Control Valve provides a permanent connection between the tank for the steering system and the 179-9223 Check Valve . This permanent connection is always closed unless the 145-8587 Lowering Control Valve is operated manually. The 145-8587 Lowering Control Valve would only be operated manually if it was necessary to lower the body with an engine that was stopped. The vacuum does not last long, but the transfer of oil can be significant over many cycles of the hoist. The oil level in the tank for the steering system will fall, while the oil level in the tank for the hoist system will rise.The transfer of oil can be stopped by removing the connection between the hoist valve and the check valve. Refer to Service Magazine, SEPD0703 6 October, "Preventing Oil Transfer Between the Tanks for the Steering and Hoist Systems" for a quick fix to the problem.Removal of the Feature for Lowering the Body
You can remove all of the components that are associated with the lowering of the body when the engine is stopped. Machines with the serial numbers AWR272-UP and AXM492-UP do not have these components. These later machines have a different arrangement for lowering the body when the engine cannot be run. If you decide to remove these components you should install the alternative arrangement that is described in the service magazine article that is referenced in the introduction.Table 1 contains a list of parts that must be removed from the machine.Table 2 contains a list of new parts that are required.
Table 1
Parts That are No Longer Required
Item Quantity Part Number Description
1 1 3J-1907 O-Ring Seal
2 1 3U-2753 Clip
3 2 5P-7462 Clip
4 2 5P-7463 Clip
5 1 5P-9297 Clip
6 3 6U-0455 Strap
7 2 6V-0683 Grommet
8 1 7S-8920 Clip
9 1 7S-8921 Clip
10 1 7U-7310 Shuttle Valve
11 2 8T-4121 Hard Washer
12 1 8T-4133 Nut
13 1 8T-4137 Bolt
14 2 8T-4223 Hard Washer
15 1 8T-4244 Nut
16 1 8T-4956 Bolt
17 1 122-8291 Hose
18 1 145-8587 Lowering Control Valve
19 2 148-8336 Connector
20 1 148-8374 Elbow
21 2 148-8378 Elbow
22 1 150-4027 Tee
23 1 150-4050 Elbow
24 1 153-6248 Adapter
25 1 165-7948 Check Valve
26 1 194-6925 Tube
27 1 201-0959 Hose
Table 2
Required Parts
Item Quantity Part Number Description
28 1 221-2821 Manifold
29 1 9S-4191 Plug
30 1 3J-1907 O-Ring Seal
31 1 148-8407 Plug
32 1 9S-4185 Plug
33 1 3K-0360 O-Ring Seal 735 Removal Instructions
Refer to Illustrations 1 to 4. Remove all of the parts that are identified in the illustrations and in Table 1. Refer to illustrations 5 and 6. Install all of the parts that are identified in the illustrations and in Table 2.
This Special Instruction will describe the cause of oil transfer between the tank for the steering system and the tank for the hoist system. This Special Instruction will also provide instructions for removing components that will permanently prevent the transfer of oil by removing the feature that allows the body to be lowered when the engine is stopped.If you apply this Special Instruction, you will leave the machine without this feature that allows the body to be lowered when the engine is stopped. The feature should be reinstated by using the procedure in Service Magazine, SEPD0703 6 October, "New Procedure for Lowering the Body With the Engine Stopped. Parts Can Be Field Installed".Description of the Problem
In certain operating conditions, there can be a transfer of oil between the tank assembly for the steering system and the tank assembly for the hoist system.This can occur after dumping when the machine is backed up on a grade. If the grade is steep enough and the body does not go over center then the body can move forward slightly at the end of the dump cycle. This movement causes a vacuum in the line that connects the hoist valve to the 179-9223 Check Valve . If this happens the check valve will unseat and oil will be drawn from the steering system hydraulic tank through the 145-8587 Lowering Control Valve . The 145-8587 Lowering Control Valve provides a permanent connection between the tank for the steering system and the 179-9223 Check Valve . This permanent connection is always closed unless the 145-8587 Lowering Control Valve is operated manually. The 145-8587 Lowering Control Valve would only be operated manually if it was necessary to lower the body with an engine that was stopped. The vacuum does not last long, but the transfer of oil can be significant over many cycles of the hoist. The oil level in the tank for the steering system will fall, while the oil level in the tank for the hoist system will rise.The transfer of oil can be stopped by removing the connection between the hoist valve and the check valve. Refer to Service Magazine, SEPD0703 6 October, "Preventing Oil Transfer Between the Tanks for the Steering and Hoist Systems" for a quick fix to the problem.Removal of the Feature for Lowering the Body
You can remove all of the components that are associated with the lowering of the body when the engine is stopped. Machines with the serial numbers AWR272-UP and AXM492-UP do not have these components. These later machines have a different arrangement for lowering the body when the engine cannot be run. If you decide to remove these components you should install the alternative arrangement that is described in the service magazine article that is referenced in the introduction.Table 1 contains a list of parts that must be removed from the machine.Table 2 contains a list of new parts that are required.
Table 1
Parts That are No Longer Required
Item Quantity Part Number Description
1 1 3J-1907 O-Ring Seal
2 1 3U-2753 Clip
3 2 5P-7462 Clip
4 2 5P-7463 Clip
5 1 5P-9297 Clip
6 3 6U-0455 Strap
7 2 6V-0683 Grommet
8 1 7S-8920 Clip
9 1 7S-8921 Clip
10 1 7U-7310 Shuttle Valve
11 2 8T-4121 Hard Washer
12 1 8T-4133 Nut
13 1 8T-4137 Bolt
14 2 8T-4223 Hard Washer
15 1 8T-4244 Nut
16 1 8T-4956 Bolt
17 1 122-8291 Hose
18 1 145-8587 Lowering Control Valve
19 2 148-8336 Connector
20 1 148-8374 Elbow
21 2 148-8378 Elbow
22 1 150-4027 Tee
23 1 150-4050 Elbow
24 1 153-6248 Adapter
25 1 165-7948 Check Valve
26 1 194-6925 Tube
27 1 201-0959 Hose
Table 2
Required Parts
Item Quantity Part Number Description
28 1 221-2821 Manifold
29 1 9S-4191 Plug
30 1 3J-1907 O-Ring Seal
31 1 148-8407 Plug
32 1 9S-4185 Plug
33 1 3K-0360 O-Ring Seal 735 Removal Instructions
Refer to Illustrations 1 to 4. Remove all of the parts that are identified in the illustrations and in Table 1. Refer to illustrations 5 and 6. Install all of the parts that are identified in the illustrations and in Table 2.