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Answered by:DR.Cummins
FIELD SERVICE TECHNICIAN
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I just wanted to thank you for all your help. We replaced all the injectors and...

Customer Question

I need to install a front crankshaft seal in a N14 cummins I have the installing tool. Everytime I press the seal in the seal pops out. Is there a trick to this?

Optional Information:
Make: kenworth
Model: t600
Year: 1994
Engine: n14

Already Tried:
installing front crankshaft seal but seal pops out when it bottoms out.

Submitted: 280 days and 23 hours ago.

Category: Heavy Equipment

Value: $28

Status: CLOSED

Expert: DR.Cummins replied 280 days and 23 hours ago.

Hello and welcome to Just Answer! I would be more than happy to assist you today. What is the part number of the seal you are trying to install?

Customer replied 280 days and 23 hours ago.

(NNN) NNN-NNNN

Expert: DR.Cummins replied 280 days and 23 hours ago.

ok do you have a engine serial number. I show a different part number i just want to verify

Customer replied 280 days and 23 hours ago.

this seal i also tried(NNN) NNN-NNNN my serial #625443 when i press the seal in the lip curls under and pops in the middle. I can see the seal coming out from the sides along the crankshaft after it seats.

Expert: DR.Cummins replied 280 days and 23 hours ago.

Ok, Please verify the ESN it should be 8 digits and located on the data tag. The info you gave me is NOT for an N14 but a 1968 NHC 250. if that is correct let me know. see below

BASE ENGINE INFORMATION
Upfit	Original
Engine Serial Number	625443
Vehicle ID Number
Shop Order #	ESN625426
Plant	CEP - Columbus Engine Plant
Build Date	28 Aug 1968
Warranty Start Date
Customer Number
Customer Name
ECM Code	Not Available For This Engine
Fuel Pump Part #	AR3863
Fuel Pump Calibration	/20
Film Card	APL
Engine Config #	NHC-250
CPL #	Not Available For This Engine
EPA Model Name
Marketing Model Name	NHC-250
Service Model Name

Customer replied 280 days and 23 hours ago.

the full serial # XXXXX XXXXX

Expert: DR.Cummins replied 280 days and 23 hours ago.

That is the VIN# XXXXX need the Serial number from the engine data Tag located on the gear housing by the air compressor, It is an 8 digit number should start with 119 or 120

Customer replied 280 days and 23 hours ago.

11711221

Expert: DR.Cummins replied 280 days and 22 hours ago.

Ok thank you(NNN) NNN-NNNNis the correct part number ONLY if you don't have a wear sleeve on the nose of the crank. Once you mess up the seal it cannot be reused,Are you using the plastic seal lip holder while install? You must. There is no trick but to follow the procedure . A normal seal is smaller... A seal that can accept a wear sleeve is larger , can you see a lip on the nose of the crank?If so there is a wear sleeve and you will need to get the correct seal.

oil seals for service replacement have an assembly tool which protects the seal lip during shipment and installation. The "LDL TFE" oil seal must be installed with the lip of the seal and the crankshaft clean and dry. Do not use any lubricant. The use of lubricant will result in oil leakage at the seal.

Seal (No Wear Sleeve) Installation

A seal without a wear sleeve may be used on new crankshafts, or used crankshafts having wear grooves less than 0.005" deep.
Use the installation sleeve provided with the seal to install the seal partially onto the crankshaft.
After installing the oil seal onto the installation sleeve, fit the sleeve over the nose of the crankshaft. Use hand pressure to transfer the oil seal over the installation sleeve onto the crankshaft as far as possible.
Remove the installation sleeve from the nose of the crankshaft

Install the included 3/16 inch spacer ring, Part Number(NNN) NNN-NNNN onto the top plate, Part Number ST-1259-1, with the three allen head screws, Part Number ST-1259-3, provided.

Install the top plate, Part Number ST-1259, (with a 3/16 inch spacer mounted) to the crankshaft, using three vibration damper mounting capscrews and flat washers.

Tighten the three capscrews alternately in 1/2-turn increments until the oil seal is installed flush with the gear cover bore.

Seal (with Wear Sleeve) Installation

Install the included 3/16 spacer, Part Number(NNN) NNN-NNNN onto the top plate, Part Number ST-1259-1. Use the three allen head screws provided, Part Number ST-1259-3.
Install the wear sleeve onto the seal using the plastic guide that is provided in the seal kit.
Apply a thin layer of sealant, such as Dow^TM 736 or equivalent, to the wear sleeve and to the crankshaft where the wear sleeve will seat

Install the dust excluder seal by hand, flush to the cover

DR.Cummins41097.7316696759

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