7. ADJUSTMENT AND REPAIR

2)Disassembly and Reassembly of Swivel Joint

•Disassembly

(1)Remove the bolts 14

(2)Remove the swivel flange 10 and the O-ring 5

(3)Remove the external snap ring C 12 and the thrust washer 11 from the swivel shaft 7

(4)Pull the swivel shaft 7 out of the swivel hub 6 and remove the O-ring 2 and the dust cover 15

(5)Remove the swivel seals 3, O-ring 2 and back-up ring 4 from the swivel hub 6.

•Reassembly

(1)Install the swivel seals 3, O-ring 2 and back-up ring 4 into the swivel hub 6

(2)Apply multipurpose grease to the inner surface of the swivel hub 6

(3)Install the O-ring 2 and the dust cover 15 onto the swivel shaft 7 and insert the shaft into the swivel hub 6 slowly.

•Use a jig (E-004 B).

•Apply multipurpose grease to the outer surface of the shaft.

(4)Install the thrust washer 11 and the external snap ring C 12 to the swivel shaft 7

(5)Install the O-ring 5 and then the swivel flange 10 on the swivel hub 6, and install and tighten and bolts 14

3)Precautions for Handling and Storing Seals

(1)Seals are packed in the package that is suitable for storage.

(2)Do not leave seals outside the packages.

(3)For storing, put seals in the packages and place them in a dark and cool place (in a parts box or cardboard box) under 104°F (40°C) to avoid direct sunlight. If the storage condition is proper, they can be stored for four or five years.

(4)Do not put anything on swivel seals, or they may be distorted.

4)How to Fit Seals (for Inner Side) •Fitting

(1)It is not abnormal to have a clearance (within approx. 3% of the shaft diameter) between the seal ring and the back ring.

(2)Check that there is no failure including distortion and scarring in the seal ring and the back ring prior to installation.

(3)Use lithium soap base multipurpose grease (cone penetration No.1 or No.2).

(4)To fit a swivel seal, make it heart-shaped as shown in the figures at the right and press one end of it into the groove. Then, fit the whole swivel seal, pressing it with your finger (Figs. 1 and 2).

(5)When using a jig for fitting swivel seals, use a jig with round edges to avoid damaging the seals. (Fig. 3)

(6)If the swivel seal is distorted after fitted, correct the distortion with a jig before assembly. (Fig. 4)

5)Repair and Replacement of Parts

(1)Disassemble and reassemble the swivel joint at a place free from dust.

(2)Completely remove the contamination, foreign matter (sludge), etc. from the removed parts.

(3)Check the seal surface of the shaft for flaws and nicks. Repair or replace the shaft when necessary.

(4)Replace the shaft if it is worn.

(5)Replace all seals in reassembly.