KMT SL-IV 100D, Руководство по эксплуатации и обслуживанию

Страница: 97 / 185

SECTION 7
HIGH PRESSURE WATER
p. 7-27 80078868
2 . With seal and bearings removed, inspect seal groove bottom for marks or
scratches and residue buildup. Clean and /or repair groove surfaces as
required.
3. Install replacement bearing rings (10).
4. Install replacement piston seal assembly (9). First install inner ring, taking
care that this ring is not twisted after installation. Slide outer seal ring over
metal edges, easing seal into place over inner ring.
NOTE: Heating the piston seal ring in hot water (150 degree F for 3-5 minutes)
increases seal flexibility.
Service Piston Plunger Sockets (2 each)
1. Remove flat spring bands (6) and remove plunger retainer pins (2). Inspect
pins and spring band for deformation or unusual wear. Clean and inspect
pin holes in piston for unusual wear or hole deformation/ enlargement.
2. Remove plunger button O-ring (8) and backup ring (7) (2 places), taking care
not to scratch or otherwise damage seal groove surfaces. Clean and inspect
seal grooves for residue buildup or surface marks that might cause seal leaks.
3. Inspect plunger button sockets for unusual wear.
NOTE:
Plungers may make an indentation in the bottom of the plunger socket. The
bottom of this socket may show the impression of the plunger on it due to
the high contact forces between piston and plunger. This compression mark
is normal.
Service Piston Internal Check Valves
NOTE: Check valve (4) servicing is not necessary unless there is suspicion of a
problem. If the check valves (2 each) or piston internal passages must be
serviced, seal and pin servicing is also recommended.
1. Check valves (items (4), 2 each) or cross-drill plug (11) removal may be
necessary. Re-install using thread locking compound applied sparingly on
the plug threads.
Excess compound may clog a check valve or block a drilled passageway.
NOTE:
To avoid excess compound, position the plug or retainer on its Allen
wrench, apply thread locking compound, then hold the plug/retainer
horizontal on a paper towel while rotating the plug/retainer to wipe off
excess thread locking compound.
2. Install O-ring in check valve cavity, positioning in hole bottom with pencil-
like blunt instrument. Install check valve with chamfered end toward O-ring.
Coat retainer (3) with thread locking compound. Then thread retainer (3)
over check valve cartridge (4). Allow 24 hours for thread locking compound
to set.
3. Install plugs (11) in cross- drilled passages by applying thread locking
compound to plug threads. Then thread plugs (2 each per hole), with the
second plug acting to lock in the first. Allow 24 hours for thread locking
compound to set.