CARRIER-PLANETARY 3332939 - Caterpillar

Valve Installation
Exhaust valves marked "EX" on the valve head should be installed in the exhaust ports; inlet valves marked "IN" on the valve head should be installed in the inlet ports.Lubricate the stem and guide for initial starting.Insert the valve through the valve guide and install the springs and the spring retainer. Compress the springs with a compressor, such as shown in the topic, VALVE REMOVAL. Insert the locks, and tap the retainer lightly as the spring compressor is removed, to make sure the locks (keepers) are seated properly in the retainer.Valve Guides
The inlet and exhaust valves operate in replaceable valve guides. After the valves have been removed, clean the valve stems and valve guides.The valve guide wear should be checked with the 1P7452 Valve Guide Measuring Group. Instructions are in Special Instructions GMG00966 for checking valve guide wear.
INSTALLING EARLIER VALVE GUIDES (Diesel and Gas Engines)
1-4H446 Driver. 2-Valve guide.
INSTALLING LATER VALVE GUIDES (Gas Engines)
A-1P7430 Driver for later two-piece valve guides. B-2P2313 Sleeve. 2-Valve guide.The valve guide (2) can be pressed out of the head using driver (1) for earlier guides and driver (A) for later two-piece guides. The exhaust valve guide is the longer of both earlier and later guides.The guides should be pressed into place carefully with driver (1) or (A). For earlier guides, run a reamer through the inlet guides to bore them to .4985-.5005 in. (12,66-12,71 mm). Bore the exhaust guides to .5000-.5020 in. (12,70-12,75 mm). Reaming should be done after the guides are installed to insure correct valve stem clearance.Later gas engine two-piece grooved guides require honing after installation.
LATER VALVE GUIDES (Gas Engines)
3-3N1414 Spacer. 4-Inlet (short) valve guide.
EARLIER VALVE GUIDES (Diesel and Gas Engines)
4-Inlet valve guide.Tools required for the final sizing are: 1P7451 Valve Guide Honing Group, 1P7452 Valve Guide Measuring Group, 1P7453 Honing Oil, and 1P5571 Brush. Special Instructions (GMG00966) included with the group, explains the sizing procedure.The spacer (3) for later guides may have a loose or tight fit on the guide. The spacer should seat on the cylinder head.
TOOLS FOR HONING GROOVED VALVE GUIDES (Later Gas Engines)Valve Lifters
The valve lifters operate in brackets which are attached to the engine block by bolts and locks under the fuel pump and governor drive housings in the V of the engine. The lifters follow the contour of the camshaft lobes and raise the push rods so that valves open and close in the specified order.Valve Lifter Removal and Installation
1. Remove the inspection covers from the side of the engine and remove the spray tube (1) bolted to the bottom of the lifter.2. Remove the valve rocker arm covers and remove the rocker arm assembly. See the covering topic.
REMOVING SPRAY TUBES
1-Spray tubes.3. Remove the fuel pump and governor drive housing from the V of the engine. See the covering topic.4. Place a wire or large rubber band (9) around the lifters (10) to hold them in place in the bracket.
PREPARING TO REMOVE VALVE LIFTERS AND BRACKETS (D379 Engine Illustrated) (Flywheel Housing Removed for Better Illustration)
2-Lifter