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TM 5-2420-222-34
11-3.
STEERING VALVE ASSEMBLY MAINTENANCE.
This Task Covers:
a.
Disassembly
c.
Repair
b.
Cleaning and Inspection
d.
Assembly
Initial Setup:
Equipment Conditions:
Materials/Parts:
•
Steering column and valve support removed (see
•
Abrasive cloth (Item 5, Appendix B)
paragraph 11-1).
•
Hydraulic fluid (Item 15, Appendix B)
•
Rags (Item 28, Appendix B)
Tools/Test Equipment:•
Dry cleaning solvent (Item 31, Appendix B)
•
General mechanic's tool kit
•
Three preformed packings (serial numbers
Field automotive shop set
235786- 235999)
•
Eight preformed packings (serial numbers
319995-342573)
General Safety Instructions:
•
Dry cleaning solvent is flammable and must not be used near open flame. Use only in a well-ventilated area.
•
Compressed air used for cleaning purposes should never exceed 30 psi (207 kPa).
a.
DISASSEMBLY
1.
Remove seven bolts (15) and cover (16) from valve housing (8).
NOTE
Step 2 applies only to loader backhoes with serial numbers 235786-235999.
2.
Remove outer and inner gear (17 and 18), plate spacer (19), sleeve spacer (20), and drive shaft (21) from valve
housing (8).
NOTE
Step 3 applies only to loader backhoes with serial numbers 319995-342573.
3.
Remove outer and inner gear (17 and 18), plate spacer (19), sleeve spacer (20), drive shaft (21), and three
preformed packings (23) from valve housing (8). Discard preformed packings.
NOTE
Perform steps 4 through 6 only if valve housing, spool, or sleeve Is damaged.
Valve housing, spool, and sleeve are a matched set and must be replaced together.
4.
Remove centering straight pin (12) from spool (13) and sleeve (14).
5.
Push spool (13) toward splined end. While rotating spool slightly in valve housing (8), remove spool and sleeve
(14).
6.
Remove six centering springs (22) from spool (13) and sleeve (14).
NOTE
Step 7 applies only to loader backhoes with serial numbers 235786-235999.
7.
Remove threaded insert (11), lockpin (10), and bearing ball (9) from valve housing (8).
11-18
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