Usage:
) D349 3300 3500
Introduction
Installation of new, and removal of old, piston pin bearings is now easier and faster, when the correct tools are used with the 5P8639 Press Group. Either an electrically operated, or a hand operated, hydraulic pump can be used with the press group. This instruction gives the procedure, and the tools needed, according to engine model for removal and installation of piston pin bearings for both standard and tapered type connecting rods. It must be remembered that in the procedure given here, the old bearing is removed and the new bearing is installed all in one movement of the press. Do this only if the connecting rod is not to be checked for straightness. If a connecting rod is to be checked for straightness, remove the old bearing, check the connecting rod for straightness, then install the new bearing with these same tools.
5P8639 Press Group
1 - Base Plate
2 - Hydraulic Cylinder Mounting Plate
3 - Pin
4 - Pusher
5 - 5P8642 Clamp Pin
6 - Legs
7 - 5P9725 Hydraulic Cylinder Group
8 - 5P8640 Bar Clamp
9 - 5P8641 Bar Clamp
10 - 5P8643 Post
11 - Bolt
12 - Nuts
13 - Lock Ring 
Parts in the 5P8639 Press Group are:
5P8655 Tool Group
A - Standard type connecting rod
Tools For Use On Taper Type Connecting Rod
1-5P8653 Adapter
2-6V2049 Adapter
3-5P8650 Adapter
4-5P8646 Adapter
5-6V3042 Adapter
6-6V4819 Spacer
7-5P8645 Adapter
8-5P8649 Adapter
9-6V3043 Spacer
10-6V3197 Spacer
11-5P8647 Spacer
12-5P8651 Spacer
13-6V3029 Spacer
NOTE: These tools are not part of any tool group. They must be ordered separately.
A - Taper area of connecting rod
Additional Tools Needed
See the chart for additional tools needed for use with the tool groups.
When some connecting rods are installed on the press group, the connecting rod part number must be put in a specific position, for removal and/or installation of a piston pin bearing. Use the charts that follow for a quick reference for the correct position of the connecting rod part number, and the tools needed according to the engine model and type of connecting rod. For those connecting rods in the chart that do not have a specific position for the part number, the connecting rod can be installed on the press group with the part number in either the "up" or "down" position.
Assembly Of 5P8639 Press Group
1. Install 5P8643 Post Assembly (1) on base plate (2) as shown, and fasten it in position with bolt (3).
2. To operate the press group from the right side, install legs (4) in holes (A), (B) and (C), then install plate (5) and nuts (6) as shown.
3. To operate the press group from the left side, install legs (4) in holes (B), (C) and (D), then install plate (5) and nuts (6) as shown.
4. Put lock ring (7) on 5P9725 Cylinder (8), then turn the threads of cylinder (8) into plate (5). Tighten the setscrew in lock ring (7).
5. Use bolt holes (E) to fasten the press group to a work bench.
Removal And Installation Of Piston Pin Bearings - Tapered Connecting Rods
1. Heat the connecting rod in an oven to a temperature of 177°-204° C (350°-400° F). Never use a direct flame to heat a connecting rod. NOTE: Be sure to remove the connecting rod bearings (bearings at crankshaft end of connecting rod), before the connecting rod is put in the oven.
2. Put the correct spacer (1) in base plate (2). For easier installation of spacer (1), lift ejector pin (3) far enough to put the spacer in alignment with the bore in base plate (2).
3. Put connecting rod (4) on base plate (2) so post assembly (5) is in the center of the piston pin bearing. Install pin (6) so it is in the center of the bore for the main bearing.
4. Install the correct adapter (7) and put hole (A) in alignment with hole (B) in the base plate.
5. Install the correct clamp bar (8) and clamp pin (9).
6. Install a new bearing (10) on adapter (7).
7. Put the correct push adapter (11) on post (5) with the taper side down as shown, and put holes (A) and (C) and bearing joint (D) in alignment with hole (B) in the base plate.
8. Put pusher (12) on adapter (11) as shown. Use the hydraulic pump to push the bearing into the connecting rod until adapter (11) makes full contact with the connecting rod [shown at location (E)].
9. Remove the tools and the connecting rod. Lift ejector pin (3) to remove the old piston pin bearing (13) from the press group.
Removal And Installation Of Piston Pin Bearings - Standard Connecting Rods
1. Heat the connecting rod in an oven to a temperature of 177°-204° C (350°-400° F). Never use a direct flame to heat a connecting rod. NOTE: Be sure to remove the connecting rod bearings (bearings at crankshaft end of connecting rod) before the connecting rod is put in the oven.
2. Put the correct spacer (1) in base plate (2). For easier installation of spacer (1), lift ejector pin (3) far enough to put the spacer in alignment with the bore in base plate (2).
3. Put connecting rod (4) on base plate (2) so post assembly (5) is in the center of the piston pin bearing. Install the correct adapter (6). NOTE: For some connecting rods, the part number must be put in a specific position, either "up" or "down". See the chart in this instruction; when the chart does not give a specific position for the part number, the part number can be put in either the "up" or "down" position.
4. For some connecting rods it is necessary that the large end (crankshaft end) be held by hand, and not put on base plate (2), for removal and installation of the piston pin bearing. For those connecting rods that are to be held by hand, move the large end of the connecting rod 90° to the right or left, according to which way the press group is assembled, for right side operation or left side operation.
5. Install a new bearing (7) on adapter (6) and then install the correct push adapter (8) (counterbore up) on post (9).
6. Put pusher (10) on adapter (8) as shown. Use the hydraulic pump to push the bearing in until push adapter (8) makes full contact with the connecting rod [shown at location (A)].
7. Remove the tools and connecting rod. Lift ejector pin (3) to remove the old piston pin bearing (11) from the press group.