wc_tx000178gb.fm
30
Maintenance
PG 2A / 3A
5.5
Replacing the Mechanical Seal
To service the mechanical seal do the following:
1. Remove the impeller
(a)
from the engine shaft by turning it countercockwise.
Note:
If the impeller is hard to remove, tap it with a plastic mallet. Do not lose any
adjusting shims
(b)
.
2. Remove mechanical seal spring
(c)
and carbon face
(d)
from crankshaft.
3. Remove mechanical seal ceramic face
(e)
and L-ring
(f)
.
4. Clean engine shaft, remove any rust. Also clean contact surface of ceramic and
carbon faces with a clean cloth. Do not lubricate seal faces.
5. Place ceramic face in L-ring and install in pump flange. Carefully place carbon
face and seal spring on engine shaft.
6. Mount impeller to engine shaft. Turn impeller shaft clockwise to tighten. See
Section
Adjusting Impeller Clearance
.
