3500 ENGINES
DISASSEMBLY AND ASSEMBLY HYDRAMECHANICAL SHUTOFF CONTROL
DISASSEMBLE CONTROL
1P1855 1P1853 1P510
HYDRAMECHANICAL
Tools Needed Pliers Pliers Driver Group
A 1
B
SHUTOFF
C
1 1
start by: a) remove hydramechanical shutoff control 1.
Remove the bolts and remove actuator valve (1) from the pressure control valve.
There is spring pressure on cover (2). To prevent possible personal injury slowly release the bolts that hold cover (2) until all the pressure is removed. 2. 3. 4. 5. 6.
7.
8.
Remove the bolts and remove cover (2) from the actuator valve body. Remove springs (4), spacer (5) and valve assemblies (3) from the valve body. Remove tube assembly (7) from the shutoff control. Remove pressure control valve (6) from the shutoff control. Put identification marks on valve assemblies (12) and (13) for assembly purposes. Remove rack shutoff valve (12) and air inlet shutoff valve (13) from the pressure control body assembly. Remove three O-ring seals from each valve. Remove plug (11) to remove pilot valve (10), and spring (9) from the pressure control body assembly. Remove manual shutoff valve (8) as a unit from the pressure control body assembly.
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