11 27 020 Removing and installing/replacing counterbalance shaft (B36A/B38A)

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Special tools required:

Necessary preliminary tasks:

Removal:

Lock counterbalance shaft in cylinder 1 TDC position with special tool 2 358 646 .

Fasten special tool 2 358 646 to crankcase with screws (1).

Fig 1: Fastening Special Tool (2 358 646) To Crankcase With Screws

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NOTE: When counterbalance shaft is locked, marks on crankshaft and gear of counterbalance shaft must align.

Fig 2: Aligning Marks On Crankshaft And Gear Of Counterbalance Shaft

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Release screw (1).

Fig 3: Locating Screw

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Release both screws (1) and remove special tool 2 358 646 .

Fig 4: Fastening Special Tool (2 358 646) To Crankcase With Screws

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Screw special tool 2 288 943 into counterbalance shaft to limit position.

Release counterbalance shaft from gear (1) with targeted hammer blows on special tool 2 288 943 .

IMPORTANT: Secure counterbalance shaft and gear against falling if necessary.

Fig 5: Releasing Counterbalance Shaft From Gear

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Remove special tool 2 288 943 .

Remove counterbalance shaft (1) in direction of arrow.

NOTE: Secure counterbalance shaft gear against falling if necessary.

Fig 6: Removing Counterbalance Shaft

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Remove counterbalance shaft gear in direction of arrow.

Fig 7: Removing Counterbalance Shaft Gear

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Installation:

Check both needle bearings (1) of counterbalance shaft.

If necessary, pull both needle bearings (1) off counterbalance shaft and replace.

Fig 8: Checking Both Needle Bearings Of Counterbalance Shaft

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NOTE: Gear is guided over guide ring (1) in crankcase (2).

Fig 9: Locating Gear Guide Ring In Crankcase

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IMPORTANT: Marks on counterbalance shaft gear and crankshaft must align.

Fig 10: Aligning Marks On Crankshaft And Gear Of Counterbalance Shaft

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Insert counterbalance shaft gear (1) into crankcase guide (2).

NOTE: Secure counterbalance shaft gear (1) against falling if necessary.

Fig 11: Inserting Counterbalance Shaft Gear Into Crankcase Guide

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Install counterbalance shaft (1) into crankcase in direction of arrow.

Fig 12: Installing Counterbalance Shaft Into Crankcase

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IMPORTANT:

Counterbalance shaft can only be installed in gear in one position:

Gear alignment mark (1)

Counterbalance shaft alignment mark (2)

NOTE: For purposes of clarity, illustration shows component removed.

Fig 13: Counterbalance Shaft And Gear Alignment Marks

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Bring counterbalance shaft (1) into contact with gear (2).

NOTE: Schematic diagram on B37.

Fig 14: Counterbalance Shaft And Gear

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NOTE: Parts: Replace screw (1).

Insert screw (1) and tighten until it makes contact.

Fig 15: Locating Screw

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Lock counterbalance shaft in cylinder 1 TDC position with special tool 2 358 646 .

Fasten special tool 2 358 646 to crankcase with screws (1).

Fig 16: Fastening Special Tool (2 358 646) To Crankcase With Screws

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Tighten down screw (1).

Tightening torque: 11 27 1AZ .

Fig 17: Locating Screw

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Release both screws (1) and remove special tool 2 358 646 .

Fig 18: Fastening Special Tool (2 358 646) To Crankcase With Screws

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