Front Crankshaft Seal - Modified Ring Installation
84mercedes01TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS
DATE: October, 1984 (supersedes 03/34a, April 1983) REF. NO.. MBNA 03/3
SUBJECT: INSTALLATION OF MODIFIED FRONT CRANKSHAFT RADIAL SEAL RING ENGINE 617.95
This Service Information contains updated information on sealing the crankcase cover and installing the modified radial seal ring. Please destroy your copy of 03/34a, April 1983.
FIGURE 1 - MODIFIED RADIAL SEAL RING:
To improve centering, the modified crankshaft radial seal ring (repair version) is covered with a heavy, grooved rubber coating over half the width of the outer shoulder. The other half is bare metal (arrow, Figure 1).
The color of the radial seal is brown (previous versions were black or green/black).
Repair Hints
If there is oil leakage around the front crankshaft radial seal ring, the crankcase cover must be removed and resealed, in addition to replacing the radial seal. Second and third repairs indicate that the procedure below is not always followed exactly. That is, removal (also in case of a new cover) and resealing the cover are omitted in many instances.
The following procedure should be strictly adhered to:
Procedure
For removal instructions, refer to microfiche "Engine 617.95 Turbodiesel, Mechanical I", job no. 01-215, 03-107, 03-324 and 03-340.
1. Thoroughly clean the removed crankcase cover (reinforced version) as well as the oil pan and crankcase sealing surfaces.
FIGURE 2:
2. Apply an even coat of M-B Sealant (part no. 001 989 29 20) or 3-M Super Silicone Sealant (No. 08661) to the sealing surfaces of the crankcase cover only where it comes in contact with the crankcase and oil pan (arrows, Figure 2). Also apply the sealant to M6 x 30 screws.
CAUTION! Do not use Loctite 573 to seal the cover.
FIGURE 3:
3. Push centering sleeve (tool no. 617 589 00 14 00) onto crankshaft journal.
4. Place crankcase cover in position and tighten screws. First, tighten the screws in the oil pan (arrows, Figure 3).
5. Replace spacer ring if wear is evident.
IMPORTANT: To inspect for wear, it is necessary to remove the spacer ring from the crankshaft. For reassembly of either the old ring (if not damaged) or a new ring, the inner surface of the ring should be coated with a film of the sealant used for the cover.
6. Place spacer ring on crankshaft journal.
FIGURE 4:
7. Coat the sealing, lip (1) of the radial seal with engine oil (Figure 4).
CAUTION! The previous method of filling the radial seal between the seal and dust lip with 1 g or 1 cu. cm. of long-term grease is no longer valid. The grease prevents the oil from being returned by the inclined webs of the sealing lip.
FIGURE 5:
8. Insert radial seal using installer (tool no. 130 589 00 61 00). The radial seal should be exactly at right angles to the crankshaft journal. Wait a minimum of five minutes before removing the installer (Figure 5).
IMPORTANT: If the radial seal ring slides out afterwards, insert installer again and remove after a longer period of time.
NOTE: The reinforced crankcase cover (part no. 617 014 05 33) should be installed on vehicles with the previous cover. Screws (M6 x 30) are necessary with the new cover
(M6 x 25 for the previous cover).
Time Allowance
03-3000 00 Crankshaft front oil seal, Replace 3.8 hours
(including crankcase cover R & R and Reseal)
03-3013 00 Crankshaft front oil seal, Replace (Oil seal exposed) 1.0 hour
(including crankcase cover R & R and Reseal)
Parts Information
Part Name Part Number
Crankcase cover 617 014 05 33
Hexagonal screw 000931 006114
Spring washer 000137 006204
Radial seal ring 011 997 22 47
Spacer ring 615 031 00 51
M-B sealant 001 989 29 20
or
3-M Super Silicone Sealant 08661 (local purchase)
Special Tool Information
Tool Name Tool Number
Centering sleeve 617 589 00 14 00
Installer 130 589 00 61 00