Disassembly and Reassembly
41
Installation of Metal Bellows Seal
With Drive Tangs
In August of 1998 Thermo King introduced a new
crankshaft with a larger input shaft which
afforded more surface area on the coupling taper.
At the same time a new method of attaching the
bellows to the crankshaft was implemented. The
new crankshaft is machined with two flat surfaces
and the new bellows has two tangs which slide
over these surfaces. The current replacement
procedure follows:
1. Install the new lip seal in the seal plate with
the lip side facing out and the flat side facing
toward the compressor.
2. Apply clean compressor oil to the new O-ring
and install it in the seal plate. Apply clean
compressor oil to the new hard ring. Ensure
that the hard ring installation tool
(P/N 204-953) is clean. Use the hard ring
installation tool to push the hard ring (with the
polished surface toward the installation tool)
fully into the seal plate. Do not pinch the
O-ring.
3. If the installation tool is not available, use the
pad in the new seal packaging to protect the
polished surface of the hard ring during
assembly.
1.
Lip Side Facing Out
2.
Flat Side Toward Compressor
Figure 44: Lip Seal Installation
1
ARC010
2
1.
This Side Toward Seal Plate
2.
This Side Toward Compressor
Figure 45: Hard Ring Positions
1.
Seal Plate
2.
O-ring
3.
Hard Ring—Install with Polished Surface
Toward Compressor
4.
Hard Ring Installation Tool P/N 204-953
Figure 46: Hard Ring Installation
CAUTION: DO NOT touch or damage the
polished seal face surfaces. Keep the
protective cap in position until final
assembly.
1
2
ARC025
1
2
3
4
ARC011
