17EATON  Series 1 Heavy Duty Hydrostatic Fixed Displacement Motors Parts and Repair E-MOPI-TS002-E September 2004
Shuttle 
Valve 
Plug
Shuttle Valves
Shuttle 
Valve 
Spring
Shuttle Spool
8. Remove the three gauge port
plug assemblies.
7. Remove shuttle valves and
shuttle spool.
6. Using a 1 in. hex wrench,
remove the two shuttle valve
plugs. Then remove shuttle
valve springs.
Disassembly 
Gauge
Port 
Plug
Gauge
Port 
Plug
9. Install the three gauge port plug
assemblies. Torque to 16 lb-ft [22Nm]. 
10. Install shuttle spool and 
shuttle valves in valve block.
11. Install shuttle valve springs and shuttle
valve plugs. Torque plugs to 68 lb-ft
[92Nm].
High Pressure
Relief Valves
12. Install the two high pressure
relief valves. Torque to 25 lb-ft
[34 Nm].
13. Install low pressure relief valve.
Torque valve to 75 lb-ft [100 Nm].
Continue with step 19, page 15.
Shuttle Valve Spring
Shuttle 
Valve 
Plugs
Assembly of 
Valve Block
Table 8.0 Torque Specifications – lb-ft [Nm]
MODEL MODEL
WHERE USED 33-39-46 54-64
Gauge Port Plug Assembly 16 [22] 16 [22]
Shuttle Cap 68 [92] 68 [92]
High Pressure Relief Valve  25 [34] 25 [34]
Low Pressure Relief Valve  75 [100] 75 [100]
End Cover Bolts – Grade 8 39 [53] 63 [85]
Relief Valve (Feathering) 25 [34] 25 [34]
Socket Pipe Plug 16 [22] 16 [22]
Valve Block Mounting Bolts 28 [38] 28 [38]
Shuttle Valve Spring
Shuttle 
Valve 
Plugs