Troubleshooting
1. Pump becomes stiff to operate
Lubricate pump in accordance with procedure
on page 6
2. At 50-80 bar the pump becomes
Piston seal kit required see page 9 . If the
difficult to pull upwards and springs
pump is used regularly it would be better
back down
to service the whole pump using the
Mk4 Full Service Seal Kit see page 9
Full instructions for fitting are supplied with
the kits.
3. Gauge needle bouncing up/down
Non return valve problem. Service as required
4. Gauge steadily loosing pressure
Bleed screw not tight enough.
Hose connections to pump and/or rifle not
tight enough
Page 11
