Twin Disc MG-5170DC, Service Manual

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Twin Disc, Incorporated
Assembly
Marine Transmission Service Manual #1020667
Assembly of Electrical Control Valve (upperbody half)
1. Install one dowel pin (large diameter) into each of the two bores of the
valve body.
2. Install one spring into each of the two bores of the valve body.
Figure 122. Dowel, Return Spring, Spool, and Plug
3. Install one spool into each of the two bores of the valve body.
4. On units equipped with the hydraulic lock feature, install one spring
followed by one pin (small diameter) into each of the spools.
5. Install the two O-ring plugs into the valve body and tighten to 75 Nm
(55 lb-ft.)
6. Apply lubricant (such as Dow Corning 200® 30,000cSt fluid) to the O-
rings of the solenoids and plug (plug used on units without hydraulic
lock). Install solenoids (and plug, if equipped) into the valve body and
torque them to 34 Nm (25 lb-ft.).
7. Insert the wires (pins) into the Weatherpak connector according to the
location markings made at disassembly. Close the end of the
Weatherpak connector to lock the wires in position.
8. Install the Weatherpak connector onto its retaining clip on the top of the
valve body.