Disassembly Procedure
Start By:
- Remove the steering metering pump. Refer to Disassembly and Assembly, "Steering Metering Pump - Remove" in this manual.
| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
| NOTICE |
|---|
Keep all parts clean from contaminants. Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components. To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly. Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination. |
Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes.
- Remove seven bolts (1) .
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| Illustration 1 | g00768563 |
Steering metering pump | |
- Remove end cap (2) .
- Remove O-ring seal (3) .
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| Illustration 2 | g00768567 |
- Remove housing (4) .
- Remove O-ring seal (5) .
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| Illustration 3 | g00768582 |
- Remove drive spacer (9), drive (8), star (7), and spacer plate (6) from the housing.
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| Illustration 4 | g00768584 |
(6) Spacer plate (7) Star (8) Drive (9) Drive spacer | |
- Remove O-ring seal (10) .
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| Illustration 5 | g00768590 |
- Remove spool and sleeve assembly (11) .
Note: Do not bind the spool and sleeve assembly in the housing. Rotate the spool and sleeve assembly slowly in order to remove the assembly from the housing.
Note: During removal, the pin may slide outward from the spool and sleeve assembly which will lock these parts in the housing. If this occurs, center the pin and continue to remove the spool and sleeve assembly.
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| Illustration 6 | g00768594 |
- Remove pin (12) from the spool and sleeve assembly (11) .
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| Illustration 7 | g00768615 |
- Remove spool (13) from the control end of sleeve (14) .
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| Illustration 8 | g00768619 |
- Remove centering springs (15) from spool (13) .
Note: The steering metering unit uses six centering springs.
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| Illustration 9 | g00768628 |
- Remove tapped plug (16) .
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| Illustration 10 | g00768635 |
Tapped plug (16) retains the manual steering check valve. | |
- Remove roll pin (18) and ball (17) .
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| Illustration 11 | g00768638 |
Manual steering check valve | |
- Remove two roll pins (20) and two balls (19) from the bolt holes by tipping the housing.
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| Illustration 12 | g00768645 |
Anticavitation valves | |
- Remove spacer (24), needle bearing (23), spacer (22), and seal (21) .
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| Illustration 13 | g00768646 |
(21) Seal (22) Spacer (23) Needle bearing (24) Spacer | |
- Pry retaining ring (25) from the housing.
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| Illustration 14 | g00768651 |
- Remove dust seal (28), bushing (27), and O-ring seal (26) .
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| Illustration 15 | g00768656 |
(25) Retaining ring (26) O-ring seal (27) Bushing (28) Dust seal | |
- Remove five hydraulic fittings (29) in order to complete disassembly of the steering metering unit.
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| Illustration 16 | g00768708 |