Magnum Venus Plastech HIS Troubleshooting Manual - Manual (Page 23)

Page 21
H.I.S. Troubleshooting Manual
1/3 of a turn and holding
upper valve keeper with
wrench in that position,
tighten lock nut against
upper valve keeper with
another wrench. This
should allow valve spool to
spin freely but not move up
or down. Reassemble
assembly to power head
and to pumping system
using assembly procedure
as outlined in manual.
Pump fails at top or bottom
of stroke
– will not restart
Broken or worn detent trip
spring. Loose detent trip
spring retainer. Check detent trip spring
retainers for tightness.
Retainers must be secure
in cylinder head. If
retainers are in place and
pump will not operate,
remove retainers and
springs. Replace any worn
or broken springs.
Examine balls for wear or
damage. Liberally lubricate
inside of retainer with
suitable grease.
Reassemble balls, springs
and retainers. Fully tighten
spring retainers.
Valve trip collar missing or
hole dirty so cannot reach
bottom. Remove head and piston
keeper and check valve trip
spring. Check piston rod to
see hole is free of rust or
dirt and trip collar is in
place.
Lack of lubrication Pump oiler must provide
adequate lubrication.
Follow instructions carefully
as given on original bottle
provided with system.
Note: Oiler is pre-set at
factory and under normal
usage should not need
adjustment.
Pump exhausts excessive
oil through silencers Excessive Lubrication. One
drop of oil falls in sight Turn oiler off for a short
period of time to allow