O) 715035 - Center Section Tool

P) 715050 - Large Push Ram

R) 715015 - Center Point (for 715010 - Alignment Fixture)

S) 715075 - Pushpin 1 3/4” x 9/16”

1. Remove outer bearings
2. Position on Fixture F
3. With push pin J remove connecting rod pin from outer throw.

4. Place crankshaft on support plates B.
5. With push pin J remove inner throw.

6. Place inner throw on Fixture F.
7. With push pin J remove outer throw.

NOTE: One rod pin must be removed for indexing during reassembly.

8. Replace inner bearings
9. Select and assemble proper Top Plate and Bushing.
10. Place on Fixture A. (Shim back of throw for stability, if necessary.)
11. Carefully press on other inner throw.

12. Assemble connecting rod and bearing on pin.
13. Lower press onto outer throw to hold in place align the throws using the square N
14. Slowly press the throw onto the pin being careful not to shear the hole.
15. Press the rod pin into the opposite inner throw

NOTE: Make sure the support plate B is under the pin.

and repeat steps 12, 13, and 14.

Force bearing splitter behind outer race as shown

NOTE: If inner race has turned on the shaft, it may be necessary to cut the race with a torch or cut off wheel.

Support bearing as shown and press shaft away from the bearing. Note the placement of the bearing spacer and bearing with shaft locating ring. Remove all outer bearings.

CAUTION:

Care must be taken to keep the connecting rods free and the shaft from hitting the floor.

During the disassembly, be sure to note the position of all bearing anti-rotation pins and locating circlips. Also note the spacer between the PTO end bearings and positioning of the center section oil pump drive gear.

Position crankshaft onto support plates. Remove roll pin (A), if so equipped, or position it between support plates.

Remove PTO and mag end crank wheels using the support blocks “E” or “F” and push pin “J”.

NOTE: Be sure to mark the inner crank wheel from which the PTO end was removed.

Separate one inner throw from the center section using the support plates “B” and the center section tool “O” as shown.

NOTE: The legs of the center section tool must be centered on the bottom crank wheel (A).

Position the center seal splitter “T” with ring as shown (A). Align the other tool half and secure halves with allen head bolts.

Using the large push pin “P” press the inner crank wheel away from the center section.

Remove the inner bearing with the bearing splitter.

Using the V-block and push pin “J” remove the lower connecting rod pin. One rod pin must be removed for proper indexing during assembly.

CAUTION:
Clean and lubricate all sliding surfaces before pressing to ease assembly and prevent galling.

Select the proper top plate and bushing. On twin cylinder shafts, the bushing is positioned as shown at (A), 180° from the top plate. Position the throw onto the bushing. Be sure the crank center (B) is positioned on the fixture center (C).

Install inner bearings using fixture. Use a suitable sleeve and press on the inner race only to prevent bearing damage. DO NOT press on the outer race.

NOTE: Picture shows bottom bushing (A) positioned for 3-cylinder crank at 120° from top plate.

Install center section onto crank wheel. Press until center section bottoms on inner race of bearing.

Position rod pin from remaining crank wheel into top plate (A) of Fixture A as shown. Top plates are interchangeable to fit different diameters of rod pins. The top plate of the fixture and the bushing (B) in the bottom of the fixture will keep connecting rod pins 180° apart. For 3-cylinder assembly, the bushing is positioned at 120°. Press until the inner bearing bottoms on the center section.

Three Cylinder
After assembling both three cylinder center sections, press on the center section tool “O” until the tool leg (A) bottoms on the lower rod pin (B). Use square “N” to align wheels.

Position the PTO end rod pin and push until it bottoms on the support plate “B”.

NOTE: Keep the support plate tight against the outer race of the bearing.

Lubricate and install rod bearing and connecting rod onto rod pin. Place the proper throw onto the rod pin. Lower the press to hold the assembly. Check and align the throw using the square “N”. Slowly press the throiw until the ram “P” bottoms on the rod pin.

NOTE: The PTO end is assembled onto the long pin.

CAUTION:
Be sure support plate is under rod pin.

Insert a .016” feeler gauge between the lower rod bearing cage and the inner throw. Slowly press the ouetr throw until it makes contact with the rod bearing cage. Remove the feeler gauge and check the clearance.

Press outer bearings as shown, using support plates “B”.
Press only on inner race to prevent bearing damage. To ease assembly, slowly and evenly heat bearings on a hot plate or in an oven to approximately 250°F and drop them into position.