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275B SER
800-00152
SERVICING THE CONTROL VALVES
SERVICING THE CONTROL VALVES
SERVICING THE CONTROL VALVES
SERVICING THE CONTROL VALVES
SERVICING THE CONTROL VALVES
Remove the valve bank from the equipment and disconnect all hoses, fittings, control handles, and linkage connectors
that might be attached to the valve. Plug all ports and thoroughly clean the valve bank’s exterior, after which the port
plugs can be removed.
VALVE BANK DISASSEMBLY
VALVE BANK DISASSEMBLY
VALVE BANK DISASSEMBLY
VALVE BANK DISASSEMBLY
VALVE BANK DISASSEMBLY
STEP 1 - MARK THE VALVE BANK
STEP 1 - MARK THE VALVE BANK
STEP 1 - MARK THE VALVE BANK
STEP 1 - MARK THE VALVE BANK
STEP 1 - MARK THE VALVE BANK
This step is the most critical step in the disassembly procedure. It should be followed very closely to ensure that the valve
bank is properly reassembled after repairs have been made. See Figure 1.
Figure 1
Figure 1
Figure 1
Figure 1
Figure 1
A. Take a waterproof, quick-drying marker and mark each casting with a sequential number. Start by marking the inlet
casting as #1 and finish by marking the outlet with the highest number.
B. Then mark the port boss closest to the back cap on each work section with a “B” (for back cap end).
C. Next mark the port boss closest to the spool clevis on each work section with a “C” (for clevis end).
D. Lastly, if relief valves must be removed from the valve bank they should be marked with the number of the casting and
port to which they belong. Inlet and mid-inlet relief valves are marked with their casting
number only.
VALVE MAINTENANCE (A20/A35 CONTROL VALVES)
VALVE MAINTENANCE (A20/A35 CONTROL VALVES)
VALVE MAINTENANCE (A20/A35 CONTROL VALVES)
VALVE MAINTENANCE (A20/A35 CONTROL VALVES)
VALVE MAINTENANCE (A20/A35 CONTROL VALVES)
