Volvo Penta TAD1630G Workshop Manual page 118

Service procedures - intake and exhaust systems
7
Clamp a suitable 12 point socket wrench in the vise with the
socket axis vertical.
8
Place the 12 point hub of the turbine wheel into the socket.
Release the compressor wheel locknut (2).
Note: Use a T-handle wrench together with a universal joint
to avoid side-loading the turbine wheel shaft.
9
Remove the compressor nut and slide the compressor
wheel from the turbine shaft. Some models have shims (5)
fitted between compressor wheel and piston ring holder (4).
The position and thickness of any shims should be noted.
Note: If the compressor wheel is sticking it may be heated
with a hot air pistol to a max of 130°C (266°F).
116
10
Gently remove the turbine shaft and wheel by tap- ping with
a small soft faced mallet on the compressor end of the shaft.
Be careful not to bend or damage the shaft.
11
Place the bearing housing (13) on the turbine backplate (16)
(if fitted) on the bench and remove the insert retaining snap
ring (20).
12
Carefully bend up the cover (7) using two screwdrivers.
Note: Thread a piece of plastic tubing over the screwdrivers
to avoid damaging the bearing housing.
13
Dismantle the insert assembly by pushing the piston ring
holder (4) out of the insert.
14
Remove the 2 screws retaining the oil deflector (23). This will
allow the oil deflector, thrust bearing (9), thrust washers (11)
and spacer sleeve (12) to be removed from the bearing
housing.
15
Using suitable circlip pliers, remove the outer circlips from
both ends of the bearing housing, remove the journal bear-
ings and inner circlips.
Cleaning of Parts
1 Aluminum parts
Soak in a non-caustic solvent until all deposits have been
softened. Clean surfaces with bristle brush and soft scraper.
Steam may be used providing bearing surfaces are protect-
ed.
2 Cast iron parts
Soak in non-caustic solvent.
Alternatively blast. Be careful with internal profile surfaces.
Group 22