Volvo Penta TAMD162C, Instruction Book

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25
Mechanical safety clutch
(get-you-home device)
The MPM IRM 350A and Twin Disc MG516 have a
mechanical safety clutch for both Forward and Reverse
clutches.
If there is a fault in the hydraulic system the clutch can
be engaged so that the boat can be brought to a harbor.
When engaging – “Forward” clutch is locked mechani-
cally by tightening the screws that press the clutch to-
gether.
NOTE! When the clutch has been engaged,
reverse or neutral cannot be engaged. Start
and run at reduced speed and do not use the
controls. Leave it in Neutral.
A fault in the hydraulic system can reduce the oil pres-
sure in the reverse gear. To avoid damage the volume
of oil in the reverse gear must be increased so that gear
wheels and bearings are lubricated through flinging.
For twin installations, extra precautions must be taken
so that the clutch used for running ”Forward” is en-
gaged in both reverse gears (counter-rotating propel-
lers).
Safety systems
Engaging the emergency clutch
Twin Disc MG516
Rotating parts. Take care not to avoid person-
al injury.
1. Stop the engine and brake the propeller shaft.
2. Unscrew both allen plugs for the “Forward” clutch.
3. Turn the engine (the screws in the clutch are
opposite both the plug holes). Tighten two screws.
Turn the engine further and tighten the other two
screws.
4. Reinstall plugs in holes.
5. Set the reverse gear lever to “Neutral” and discon-
nect the control cable from the lever.
Run at reduced speed, there is no reverse. Repair
the fault at the earliest possible opportunity.
Emergency clutch IRM 350A
Emergency clutch TD MG516
MPM IRM 350A
Stop engine before engaging! There is other-
wise a risk of serious personal injury.
Unscrew the inspection cover (where the oil filler plug is
mounted). Turn the engine so that the locking screws in
the clutch (3 x 19 mm hexagonal) are accessible. Tight-
en the screws alternately (clockwise).
After engagement the input and output shafts are me-
chanically locked to each other and the reverse gear
cannot be put in neutral.
The control lever must be in the neutral posi-
tion when the engine is running and the emer-
gency clutch is engaged. Otherwise the clutch
plates will be damaged. Disconnect the gear
cable for safety’s sake.
Run at reduced speed, there is no reverse. Repair
the fault at the earliest possible opportunity.
Note Unscrew the locking screws to their original posi-
tion when the fault has been remedied. Lock screws
with Loctite 242.