Skip to main content
Piston, Pin, and Connecting Rod Replacement

Special Tools Required

Piston base head
 07PAF-0010400

Piston base head attachment
 07PAF-0010500

Insert pin
 07PAF-0010700

Piston pin pilot
 070AF-PWC0110

Insert adjuster
 070AF-PWC0120

Pilot collar, 18 mm
 070AF-PWC0130

Piston base
 07973-6570500

Spring
 07973-6570600
Disassembly
  1. Assemble the special tool as shown.

  1. Temporarily install the pilot collar over the piston pin base insert (A), and adjust the piston base head inserts as shown, then tighten the screws (B). Remove the pilot collar.

  1. Assemble and adjust the length of the piston pin driver head and shaft to 57 mm (2.2 in.).

  1. With the arrow on top of the piston pointing up, place the piston assembly (A) on the special tool (B).
    Be sure you position the recessed flat area of the piston against the piston base head inserts (C) as shown.
  1. Press the pin (D) out with the pin driver (E), the pilot collar (F), and a hydraulic press.

Inspection
  1. Measure the diameter of the piston pin.

    Piston Pin Diameter

    Standard (New):
    17.996−18.000 mm (0.7085−0.7087 in.)


  1. Zero the dial indicator to the piston pin diameter.

  1. Measure the piston pin-to-piston clearance.

    Piston Pin-to-Piston Clearance

    Standard (New):
    0.010−0.017 mm (0.0004−0.0007 in.)


  1. Check the difference between the piston pin diameter and connecting rod small end diameter.

    Piston Pin-to-Connecting Rod Interference

    Standard (New):
    0.019−0.036 mm (0.0007−0.0014 in.)


Reassembly
  1. Assemble the piston and connecting rod with the arrow (A) and the embossed mark (B) on the same side.

  1. Insert the pilot collar (A) into the piston and the connecting rod.
  1. With the arrow on top of the piston and the embossed mark on the connecting rod facing up, place the piston assembly (B) on the special tool (C). Be sure you position the recessed flat area of the piston against the piston base head inserts (D) as shown.
  1. Press the pin (E) in with the pin driver (F) and a hydraulic press.