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375 SE
800-00162
STEP 8 - DETENTED SPOOL
STEP 8 - DETENTED SPOOL
STEP 8 - DETENTED SPOOL
STEP 8 - DETENTED SPOOL
STEP 8 - DETENTED SPOOL
Again these parts should not be removed from the spool unless they need to be replaced.
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Wrap the detent sleeve (Item 17) with a clean rag. Grip the rag covered sleeve and pull firmly. As the sleeve
moves backwards, the detent balls (Item 18) and the detent spring (Item 19) will pop free. The rag should capture
these parts and prevent their loss.
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Next clamp the spool in a soft jawed vise and remove the detent poppet retainer (Item 20) use an under sized bar
through the detent ball bore as a wrench. Cautious application of heat may again be required because an anaerobic
adhesive is also used in the retainer’s assembly.
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
TOO MUCH HEAT MAY DISTORT THE SPOOL!
TOO MUCH HEAT MAY DISTORT THE SPOOL!
TOO MUCH HEAT MAY DISTORT THE SPOOL!
TOO MUCH HEAT MAY DISTORT THE SPOOL!
TOO MUCH HEAT MAY DISTORT THE SPOOL!
CLEANING, INSPECTION, AND REPAIR
CLEANING, INSPECTION, AND REPAIR
CLEANING, INSPECTION, AND REPAIR
CLEANING, INSPECTION, AND REPAIR
CLEANING, INSPECTION, AND REPAIR
1. Inspect the spool bores, check seats, and spools for deep scratches, gouges, or excessive wear. If any of these
conditions exist, replace the section. Minor surface damage on the control spool and check poppet may be
carefully polished away with very fine crocus cloth.
2. Examine the machined surfaces of the valve housing for nicks and burrs that could cause leakage between
sections. Lightly stone these surfaces to remove any rough spots.
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
A shallow milled relief area (noted in Figure 2)
A shallow milled relief area (noted in Figure 2)
A shallow milled relief area (noted in Figure 2)
A shallow milled relief area (noted in Figure 2)
A shallow milled relief area (noted in Figure 2)
extends across the o-ring face of the valve housing.
extends across the o-ring face of the valve housing.
extends across the o-ring face of the valve housing.
extends across the o-ring face of the valve housing.
extends across the o-ring face of the valve housing.
It should not be stoned or ground off.
It should not be stoned or ground off.
It should not be stoned or ground off.
It should not be stoned or ground off.
It should not be stoned or ground off.
3. Wash all parts thoroughly in a clean solvent and blow dry before beginning reassembly. Pay special attention to the
number and letters marked on the parts in Step 1. If any marks are removed during cleaning, remark immediately.
VALVE BANK REASSEMBLY
VALVE BANK REASSEMBLY
VALVE BANK REASSEMBLY
VALVE BANK REASSEMBLY
VALVE BANK REASSEMBLY
Reverse the procedures outlined in Steps 1 through 8. Also follow the additional instructions listed below.
SPOOL ASSEMBLY- SPRING CENTERED
SPOOL ASSEMBLY- SPRING CENTERED
SPOOL ASSEMBLY- SPRING CENTERED
SPOOL ASSEMBLY- SPRING CENTERED
SPOOL ASSEMBLY- SPRING CENTERED
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Clamp the control spool in a soft jawed vise. Apply a small amount of Loctite 262 or equivalent anaerobic
adhesive to the stripper bolt (Item 14) before assembly.
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
Follow the adhesive manufacturer’s instructions
Follow the adhesive manufacturer’s instructions
Follow the adhesive manufacturer’s instructions
Follow the adhesive manufacturer’s instructions
Follow the adhesive manufacturer’s instructions
for proper cleaning and curing. Failure to clean
for proper cleaning and curing. Failure to clean
for proper cleaning and curing. Failure to clean
for proper cleaning and curing. Failure to clean
for proper cleaning and curing. Failure to clean
and prepare parts properly may result in assembly
and prepare parts properly may result in assembly
and prepare parts properly may result in assembly
and prepare parts properly may result in assembly
and prepare parts properly may result in assembly
failure.
failure.
failure.
failure.
failure.
A20/A35 CONTROL VALVE MAINTENANCE CONTINUED...
