Installation Of 5N1948 And 2W3037 Sound Isolation Mounting Groups{1000, 3300, 7060} Caterpillar

5N1948 - Engine and Marine Transmission

2W3037 - Engine Only

Installation of Sound Isolation Mounting Groups causes a reduction in movement of noise and vibration from the engine and marine transmission to the structure of the vessel. Similar isolation materials should be installed on all components of the drive line. Other publications that are to be used along with this instruction during the installation and alignment of Marine Engines and Marine Transmissions are:

Cat Marine Engine Application and Installation Guide, Form LEHM1469

Aligning Caterpillar Marine Power Packages, Form SEHS7456

Isolator Group Assembly And Installation

(1)

1) Install two 5N1905 Washers (1) in 5N1904 Base (2). Again, install one 5N1905 Washer (3) on each 5N1903 Spool (4) as shown. Press the spool and washers into base (2).

NOTE: Washers (3) must be 0.80 ± 0.13 (.031" ± .005") above base (2); if not, use 5N1907 Shims (5) as necessary. Install 5N1906 Plates (6) with eight S1594 Bolts and 5M2894 Washers. Install 5N1901 Screw (7) with 5N1902 Shims (8).

2) Install the isolator group onto the engine rails with two 5P8250 Washers (9), two 1B4333 Nuts (10) and two 1D6306 Nuts (11). Install 2H3893 Screw (leveling) (12) through base (2). Make alignment of the engine and marine transmission to the companion flange from side to side and vertically.

3) With a 27.5 Ø (1.08" Ø) drill, drill all mounting holes (A) in the ship's rails, using holes (B) in each base (2) as a guide.

4) Install a steel plate (13) (or thick shim) between base (2) and the ships rails.

5) Loosen leveling screws (12) and install bolts (14) as shown.

6) Again, check the alignment from side to side and make adjustments if necessary.

7) Again, check the vertical alignment. If adjustment is necessary, loosen nuts (10) and (11) and lift or lower the engine and marine transmission as needed by turning hex nuts (15) of screws (7). To make sure the load is equal between both mounts, try to keep nuts (15) at the same torque.

8) After alignment is complete, add shims (8) as necessary and again tighten nuts (15). To keep spools (4) from turning, use a wrench on the flat areas of the spool.

Installation Of Thrust Components

(1) After alignment of the engine and marine transmission is complete, install eight 3N6048 Bushings (1) in 3N6047 Block (2). Install 3N6045 Pad (3), 3N6049 Plate (4) and four 2B2006 Bolts (5) with two 4L8767 Locks (6). Install the complete assembly on 3N6044 Bracket (7) with 3N6045 Pad (8) as shown. Tighten bolts (5) to a torque of 40 ± 7 N·m (30 ± 5 lb. ft). Bend locks (6). Fasten each thrust component to the engine rail with clamps. Before holes (A) for bolts (9) are drilled through the engine rails, make sure the hole centers will be a minimum of 38 (1.50") from the end of the rail as shown. Also, make sure holes (B) for bolts (10) can be drilled through the ship rails. With a 25 Ø (.968" Ø) drill, and using the holes in bracket (7) as a guide, drill two holes (A) through the engine rails only (each side). With a reamer, ream holes (A) to 25.4 ± .025 Ø (1.00" ± .001" Ø). Install two bolts (9), nuts and washers (each side). Put spacer (11) and shims (12) [as necessary] in position as shown and weld spacer (11) to the ship rail at locations (C) and (D) [each side]. With a 21.4 Ø (.84" Ø) drill, and using the holes in block (2) as a guide, drill three holes (B) through block (2), spacer (11) and the ship rails (each side). With a reamer, ream holes (B) to 22.225 ± .025 Ø (.875" ± .001" Ø). Install three ground body bolts (10), nuts and washers (each side).

NOTE: Bolts (10) are 22.174 ± .025 Ø (.873" ± .001" Ø) and are to be furnished by the installer.