Improved Dust Seal for the Swing Gear and Bearing is Now Available on Certain Excavators {7063} Caterpillar

Excavator

320 (S/N: ZBN1-UP)

320 GC (S/N: DKJ1-UP)

320D (S/N: BK81-UP)

320D2 (S/N: ZBD1-UP; ZBH1-UP; LZJ1-UP; DNS1-UP; TDZ1-UP)

323 (S/N: YBL1-UP)

323D2 (S/N: FLC1-UP; FEF1-UP; TDT1-UP)

326D2 (S/N: MZH1-UP; XAM1-UP; KER1-UP; NPR1-UP)

330D2 (S/N: ZBF1-UP; SZK1-UP)

336D (S/N: SM31-UP)

336D2 (S/N: WDC1-UP; YCF1-UP; MEH1-UP; FAJ1-UP; HBK1-UP; DGR1-UP; FBT1-UP; LBX1-UP)

340D2 (S/N: JEE1-UP; HHK1-UP)

349D2 (S/N: FH31-UP; FE51-UP; ZAE1-UP; YAG1-UP; TAH1-UP; RAN1-UP; GAX1-UP)

374F (S/N: DPE1-UP; EBF1-UP; NFJ1-UP; MFL1-UP)

390F (S/N: EXB1-UP; HJD1-UP; PYE1-UP; HNG1-UP; FEH1-UP; GAY1-UP)

Mobile Hydraulic Power Unit

336D MHPU (S/N: L5X1-UP)

374F MHPU (S/N: H251-UP)

OEM Excavator Based Specialty Solution

374F OEM (S/N: FH91-UP; P4L1-UP)

390F OEM (S/N: N641-UP; P4J1-UP)

OEM Mobile Hydraulic Power Unit

330D2 MHPU (S/N: HER1-UP)

Reference: Special Instruction , M0075782 , "Improved Procedure for the Installation of Swing Gear and Bearing Dust Seals."

Description Of Change: The manufacturing process was changed for better seal durability.

Adaptable To: The following information is applicable to the machines listed above.

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Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

How to distinguish between a New and Old Seal.

Illustration 1	g06376989
Undamaged Seal

Illustration 2	g06376992
Damaged Seal

A date is printed in yellow on the lip surface of the seal in the following Format: YY-MM-DD. If the date is labeled 17-12-01 or later, the seal is new. If it is older, the seal may need to be replaced. Please follow the following procedure to determine if your seal needs to be replaced.

Illustration 3	g06376995

How to determine if your seal needs replaced.

Note: If possible, disengage the upper frame.

1. Check if the color of grease in the reservoir is the same as the raceway. If yes, your seal may need to be replaced.

2. Check if the color of grease in the reservoir is the same as grease leakage. If yes, your upper seal needs replaced.

3. Check to ensure that both the upper and lower seals are correctly assembled.

4. Check to ensure that both the upper and lower seals do not crack at the connection.

5. If either condition is not met, the seal needs replaced.