General Service Adjustments; Engine Speed; Check Valve (Solution Outlet); Water Box - Prochem LGTPC Operating Instructions Manual

Maintenance

General Service Adjustments

USE EXTREME CAUTION the high-speed mechan-
ical parts as well as high temperature components
may result in severe injury, severed limbs, or
fatality.
FAIRE PREUVE DE LA PLUS GRANDE PRUDENCE
les pièces mécaniques à haute vitesse de même
que les composants à haute température pourrait
causer des blessures graves, des amputations ou
la mort.

Engine Speed

This unit uses a factory installed engine governor. The
engine speed is adjusted by pulling the throttle out to
maximum travel for high speed operation. For lower
temperature or vacuum setting, rotate knob clockwise
two turns or as needed to obtain desired temperature
and vacuum settings. Pushed in, the engine is at idle
speed (1400 rpm). With throttle pulled out, engine
operates at maximum rpm (2950).
DO NOT attempt to adjust without a tachometer and
NEVER adjust the engine to exceed stated maximum
RPM (Full Load). Permanent damage may occur.
NE PAS tenter d'effectuer un réglage sans
tachymètre et ne JAMAIS régler le moteur de façon
à excéder le nombre de tours par minutes indiqué
(pleine charge). Cela pourrait cause des
dommages permanents.

Check Valve (Solution Outlet)

Inspect the check valve whenever doing service on the
chemical pump or if flow problems occur in the
chemical system:
1. Remove the check valve. Be sure the small o-ring
for the seat comes out with the check valve.
48
O-RING
SEAT
Use 5/16 Allen
Wrench to remove
2. Remove the seat, using a 5/16" Allen wrench.
3. Check the Teflon seat for debris or wear. Clean or
replace Teflon seat if needed.
4. Clean the poppet and spring, inspect for wear or
damage, and replace as needed.
5. Re-assemble the check valve. Start the seat by
hand, tighten using a 5/16" Allen wrench. DO NOT
over-tighten seat.
NOTE: Improper seating of the check valve poppet,
damaged spring or o-rings will cause poor operation
of the chemical system.
6. Lubricate the o-rings with o-ring lubricant Part
#86255430, PRV NO. 05-008035 and reinstall.

Water Box

1. Check inlet strainer for debris and blockage. A
blocked strainer could damage the solution pump if
water flow is restricted.
2. Inspect water box float valve for freedom of move-
ment and water leaking past valve.

Chemical Pump

The only repairs which the chemical pump may require
are the replacement of the diaphragm, plastic disk or
check valves. To replace the diaphragm and plastic
disk unscrew the cover from the body. When replacing
the diaphragm, lubricate the outer edges of the
diaphragm with o-ring lubricant Part #86265430 and
reassemble. To replace the check valves, unscrew the
check valve caps. Replace the check valves and reas-
semble, using new o-rings.
86411060 Manual Operators - Legend GT
CHECK VALVE DETAIL
TEFLON SEAT
SPRING
Tight wrap
on spring
POPPET
CHECK
VALVE CAP
O-RING