Table of Contents
Advertisement
Walter V-Drives
Operation
A pressure drop warning light is mounted on the
instrumeut panel on V-drives equipped with an oil
circulating pump. The warning light will sta on until the
boat gets under way and the engine speed increases to
sufficient RPM for the pump to maintain pressure. This
normally occurs at approximately 1200 RPM, but the
actual speed may vary by as much as 400 rpm. Extended
cruising at low rpm, such as when trolling, is not
harmful to the V -drive, even though the warning light
may stay lit. Normal operation is between 6 ro 12 psi.
The light will go on when the oil pressure drops below 2
psi. Loss of oil andlor insufficient oil level are the major
causes of pressure drop.
The oil level should
immediately be restored, and while running the boat, the
unit should be checked for leaks.
If
the oil level is
normal and the light stays lit when the boat reaches
normal cruising speed, the wiring should be checked for
loose andlor corroded connections.
If the wiring is
correct and the light remains lit, the #49 pressure drop
switch, which is mounted on the side of the V-drive (see
illustration), should be checked for proper operation.
*49 PRE'SSIURE'..1
DROP SWITCH
WATER
The switch can easily be removed and an accurate oil pressure gauge installed in its place. If the pressure
is normal, the switch should be replaced. If the pressure is below normal, the oil lines should be checked
for blockage. The pump is standard on the RV-48 and an optional feature on other models (not available
on the RV-IO).
The oil level should be checked several times during the season, especially on V -drives without pumps
(see Oil Fill).
A clatter or rattle in the V-drive at low rpm is due to the overriding of the propeller during the
compression stroke of the engine. Although annoying, it is not harmful. It may be reduced by adjusting
the idle speed up andlor tuning up the engine for smoother operation.
Maintenance
I. Oil Change And Joint Lube
After the first 100 hours or operation and every season
andlor 500 hours thereafter, the oil should be changed.
Run the boat to warm up the V -drive operating
temperature. Turn off the engine. Remove the plugs in
the #4B bottom cover that is opposite the #43S oil
strainer from the #43S strainer (leave the elbow on the
strainer).
Unscrew the strainer and clean the outside
surface. Reinstall the strainer and reconnect the oil hose.
Unscrew the two #22 magnetic plugs that are located on
diagonally opposite corners of the # I C main housing.
"lC HOUSING
ON
*435 OIL STRAINER
lREMOVE
&
CLEAN
OUTSIDE SURFACE)
SERIAL
NUMBER
2 MAGNETIC PLUG 121
DIAGONALLY OPPOSITE
The plugs can be checked to see if they are magnetic only after removal. Touch the insides face with a
85
Westerbeke Diesel Engines
Advertisement
Table of Contents
