31
Maintenance instructions for DP
drive installations in commercial
use
The more detailed instructions given in the instruc-
tion book must be followed in addition to these brief
instructions. This applies to items of equipment as
well as when running-in the engine.
Note that the service intervals for installations in
commercial operation differ from the intervals given
in the instruction book.
The checks which should be carried out by technici-
ans at an authorized workshop are written in italics.
Daily
Visual inspection of the drive and propellers. Dama-
ged propellers must be replaced.
Monthly
Check the corrosion protection on the drive and co-
ver. Replace when half the anode has been corro-
ded. Check the universal-joint and exhaust bellows.
Replace as required.
Replace the corrosion protection.
Check painted surfaces for corrosion damage and/
or places where mechanical action has removed the
paint.
Annually
Clean and touch up paint.
Replace the universal-joint and exhaust bellows.
Replace the exhaust bellows between the engine’s
exhaust bend and the cover’s exhaust pipe.
After the first 2-5 hours
Run in the drive with a light load. The oil in the drive
must be changed after 2-5 hours. Check that the
drive is properly drained.
Every 125 hours
Change the lubricating oil. See the recommenda-
tions in Technical Data.
Lubricate the guide bushings in the cover.
Check the oil level in the servopump (on the engi-
ne).
Check the oil level in the trim pump.
Check the tightening torque at the following points:
1 The joint between the lower gear housing and the
intermediate housing.
2 The joint between the upper gear housing and the
intermediate housing.
3 The joint between the steering arm and the steer-
ing spindle.
Tighten the hose clamps.
Check the universal-joint bellows for any water lea-
kage.
Every 500 hours
Check the bushings in the drive mounting.
Check the guide bushings and seal in the cover.
Check for play in the holes for the drive mounting
journals in the drive.
Lubricate the guide bearing in the guide fork.
Check the control cable, coupling bushings and
controls.2
Check the grounding.
Check the servo cylinder and hoses for any oil lea-
kage.
Check for wear/play in the control cable.
Check the propeller shaft for straightness.
Check the gear mechanism for wear and servicea-
bility.
Check the “non-return valve” in the exhaust.
Check that there is no abnormal play in the steer-
ing
.
Every 1000 hours
Change the drive for a replacement drive or recondi-
tion drive.
Replace control cables and control bushings.
Check the exhaust pipe for corrosion damage.
Check the bellows between the exhaust pipe on the
engine and the exhaust pipe on the inside of the co-
ver.
Check the cooling water hoses and connections on
the inside of the cover.
Check the hydraulic hoses for leakage and wear on
the outside of the cover.
Additional action may be necessary if the type of
operation differs significantly from Volvo Penta’s
application classes or if gear-changing is more fre-
quent (more than 20 changes per hour on average).
Restrictions
This maintenance instruction applies to:
Engine AD41 “Medium Duty” (165 hp / 3800 rpm).
Engine AD41 ”Light Duty” (200 hp / 3800 rpm).
Maximum drive extension for commercial operation
= 1".
If the water is severely polluted, particular attention
must be given to corrosion damage.
Long period of operation in neutral should be avoi-
ded. The gear for forward propulsion must be enga-
ged for a continuous period of at least 5 minutes for
every hour of use.
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