Piston, Pin and Connecting Rod Replacement
ReplacementSpecial Tools Required
^ Piston base 07973-6570500
^ Piston base spring 07973-6570600
^ Piston pin base insert 07973-PE00400
^ Piston base head 07973-SB00100 or 07TGF-001000A
^ Pilot collar 07973-PE00200
^ Piston pin driver shaft 07973-PE00310
^ Piston pin driver head 07973-PE00320
Disassembly
1. Remove the piston from the cylinder block
2. Assemble the special tool as shown.
3. Assemble and adjust the length of the piston pin driver head and shaft to 53 mm (2.1 inch).
4. With the embossed mark facing up, place the piston assembly (A) on the special tool (B). Be sure you position the recessed flat on the piston against the lugs on the base attachment.
5. Press the pin (C) out with the pin driver (D), pilot collar (E) and a hydraulic press.
Inspection
1. Measure the diameter of the piston pin.
Piston Pin Diameter
Standard (New): 18.996 - 19.000 mm (0.7479 - 0.7480 inch)
2. Zero the dial indicator to the piston pin diameter.
3. Measure the piston pin-to-piston clearance.
Piston Pin-to-Piston Clearance
Standard (New): 0.010 - 0.020 mm (0.0004 - 0.0008 inch)
4. Check the difference between the piston pin diameter and connecting rod small end diameter.
Piston Pin-to-Connecting Rod Interference
Standard (New): 0.016 - 0.036 mm (0.0006 - 0.0014 inch)
Reassembly
1. Assemble the piston and connecting rod with the connecting rod oil hole (A) facing the "IN" mark (B).
2. Insert the pilot collar (A) into the piston and connecting rod.
3. With the embossed mark facing up, place the piston assembly (B) on the special tool (C). Be sure you position the recessed flat on the piston against the lugs on the base attachment.
4. Press the pin (D) in with the pin driver (E) and a hydraulic press.