TIRE & RIM AR 3849263 - Caterpillar

TYPE="LEVEL" DEPTH="1" @@@-->Transmission Installation
Alignment
Proper alignment of an engine and marine unit is critical... both during the initial installation and at frequent intervals during the life of the boat. It is rather common for a boat to change its form with various loads and with age. A bend is actually formed in the keel which changes the original engine and shaft alignment. The following steps may be taken to secure proper marine transmission alignment.Propeller Shaft Installation
1. A wire is run through the shaft log and secured to a brace near the engine bed, giving the wire a position equivalent to the shaft centerline.2. The stern bearing and stuffing box are installed and bolted into position with the wire passing through each in the exact center of the bore. With the bearing and stuffing box in place, the wire is then removed.3. The propeller shaft is then installed in its proper position.4. If an intermediate shaft is used, it is blocked into position and its coupling is aligned with the propeller shaft coupling (see the folowing section - "Engine and Marine Transmission Alignment"). If there is an intermediate bearing in the line, this is installed and positioned with shims during the alignment process.5. If a light shaft is used without an intermediate bearing, the shaft must be centered and supported to take out the droop while alignment of the flange couplings is being made.
Alignment Of Engine And Marine Transmission
(1) Flywheel housing. (2) Indicator. (3) Marine transmission. (4) Support bracket. (5) Engine. (6) Bedrail. (7) Shim here.Engine And Marine Transmission Alignment To Propeller Shaft.
1. It is important to align the engine and transmission, only when the boat is afloat, and NOT in drydock. During this alignment period, it is also advisable to fill the fuel tanks and add any other ballast that will be used when the boat is in service. With the engine and transmission in position on the engine bed, arrangements must be made to have a controlled lifting or lowering of each of the four corners of the engine. If threaded holes are provided in each of the engine mounts, jacking screws can be used in them. The engine can be raised by screwing down, or lowered by backing off the desired amount. Steel plates must be inserted under the jacking screws so that the bolts will not damage the engine bed. Lifting can also be accomplished by the used of chain hoists or properly placed jacks. Adjustable shims also are available and can simplify the whole problem, particularly for future realignment.
Checking The Driving Ring Pilot Bore of Engine Flywheel
(1) Engine. (2) Dial indicator. (3) Crankshaft. (4) Flywheel. (5) Flywheel housing.2. It will also be necessary to move the engine and transmission from one side or the other on the bed to obtain horizontal alignment. This can be done with a jack placed horizontally between the engine and the foundation. At the same time, a straight edge is laid across the edges of the flanges at the top