Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320D EXCAVATOR BZP
Configuration: 320D Excavator BZP00001-UP (MACHINE) POWERED BY C6.4 Engine
Testing and Adjusting
C4.2 and C6.4 Engines for Caterpillar Built Machines
Media Number -KENR6741-23 Publication Date -01/07/2013 Date Updated -30/07/2013
i05192642
Finding Top Center Position for No. 1 Piston
SMCS - 1105-531
Note: Refer to the Disassembly and Assembly for your machine for the removal of components.
Note: A timing mark for top dead center is present on the crankshaft pulley. If the mark cannot be
found or if the mark is suspected to be incorrect, refer to the procedure below.
Table 1
Required Tools
Callout Part Number Description Quantity
A 299-9126 Crankshaft Turning Tool 1
1. Remove the valve mechanism cover from the engine.
Illustration 1 g01420177
(A) 299-9126 Crankshaft Turning Tool
2. Install Tooling (A) on the engines flywheel housing. Use Tooling (A) in order to rotate the
engine. Refer to Illustration 1.
3. Rotate the crankshaft clockwise when you face the front of the engine. Rotate the crankshaft
until the pushrod for the inlet valve of the rear cylinder begins to tighten.
4. Rotate the crankshaft further by 1/8 of a turn in a clockwise direction. Insert a suitable lever
between the rocker arm and the valve spring cap of the No. 1 inlet valve. Open the inlet valve.
Put a spacer that is approximately 5 mm (0.2 inch) thick between the valve stem and the rocker
arm.
5. Slowly rotate the crankshaft in a counterclockwise direction until the piston contacts the open
valve. Make a temporary mark on the damper or the pulley. The temporary make must align
accurately with the tip of the pointer.
6. Rotate the crankshaft in a clockwise direction by 1 degrees or 2 degrees. Remove the spacer
that is between the valve stem and the rocker arm. Rotate the crankshaft by 1/4 of a turn in a
counterclockwise direction. Put a spacer that is approximately 5 mm (0.2 inch) thick between
the valve stem and the rocker lever of the No. 1 inlet valve.
7. Slowly rotate the crankshaft clockwise until the piston contacts the open valve. Make another
temporary mark on the damper or the pulley. The temporary mark must align accurately with
the tip of the pointer.
8. Make a temporary mark at the center point between the two marks on the damper or the pulley.
Remove the other two marks. Rotate the crankshaft by 1/8 of a turn in a counterclockwise
direction. Remove the spacer between the valve stem and the rocker arm.
Illustration 2 g01811376
(1) Pointer
(2) Pulley
(3) Top center mark
Illustration 3 g01830733
(1) Pointer
(2) Pulley
(3) Top center mark
9. Slowly rotate the crankshaft in a clockwise direction until the mark on the damper of the pulley
(2), which was made in Step 8, aligns with the tip of the pointer (1). The No. 1 piston is now at
the top center on the compression stroke. Refer to Illustration 2 and Illustration 3.
Copyright 1993 - 2020 Caterpillar Inc. Tue Apr 7 05:44:54 UTC+0700 2020
All Rights Reserved.
Private Network For SIS Licensees.
