- Marine Auxillary Engine
- 3512C (S/N: SLM1-UP; T3Y1-UP)
- 3516C (S/N: JTS1-UP; TKX1-UP)
- Marine Engine
- 3512C (S/N: TTG1-UP; TKP1-UP; T3W1-UP)
- 3516C (S/N: TTH1-UP; TTJ1-UP; TKR1-UP; TKS1-UP; TKT1-UP; TKY1-UP)
Introduction
Do not perform any procedure in this Special Instruction until the information has been read and understood.
This Special Instruction describes the rework procedure for adding a dowel pin to the joint between the turbocharger cartridge and turbine housing.
Required Parts
Part | Qty |
---|---|
1A-2036 Dowel | 2 |
243-2975 Clamp As | 4 |
302-6504 Bellows | 2 |
372-5858 Band Clamp | 2 |
Procedure
Note: Apply the following procedure to both turbochargers on the engine. Follow this procedure for replacement or during overhaul for the turbocharger cartridge.
Illustration 1 | g03733940 |
- Prior to changing out the clamps, loosen the two bellows that connect to the turbine housing, so that the turbo is isolated and there is no force pulling on the turbine housing.
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Illustration 2 g03733942 - Verify that the turbo housing is aligned properly. Make sure that the two mating flanges are flush all the way around.
Note: If necessary, loosen the turbo cartridge bolts to allow the cartridge to move and align the cartridge flange with the turbo flange.
Show/hide tableIllustration 3 g03733945 - The housing must be retained although the clamp is off. Use a C-clamp to hold the housing in place.
- Install an old V-band clamp to be modified for use as a drill guide.
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Illustration 4 g03733946 Show/hide tableIllustration 5 g03733947 (A) 15.875 mm (0.625 inch)
(B)6.5 mm (0.255 inch)
(C)19 mm (0.75 inch) - Fabricate the drill guide using an old V-band clamp and weld a lead boss to the old V-band clamp. Ensure that this boss is centered on the old V-band clamp.
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Illustration 6 g03733948 Cross-section view
(D)12.5 mm (0.492 inch)
(1)372-5858 Band Clamp
(2) Turbine housing
(3) Cartridge - Set the drill guide in place for drilling. Drill a hole with a 6.5 mm drill bit to a maximum drill depth of
12.5 mm (0.492 inch) .Note: The drilled hole must be centered between the flange halves on the top side of the flanges.
Show/hide tableIllustration 7 g03733949 (4) 1A-2036 Dowel - Set dowel pin (4) in place.
Note: Pin must be clearance fit, not pressed fit. The dowel should not be over a
0.5 mm (0.020 inch) maximum protrusion.Show/hide tableIllustration 8 g03733950 Show/hide tableIllustration 9 g03733952 - Once the dowel pin is in place, install the 372-5858 Band Clamp following Engine News, SEBD9761, "A New Band Clamp Is Available for Turbochargers on Certain 3500 and C175-16 Engines".
Refer to the Disassembly and Assembly for the engine for the procedure to install the 302-6504 Bellows.