Stiga HPS 110 Troubleshooting Manual page 10

Nr. PROBLEM
Motor Straining
current
6
absorbed5.1Electrical
data)).
Current absorbed
7
low(5.1Electrical data)
Motor briefly
8
('hiccups') with
closed (trigger released).
Nr. PROBLEM
Abnormal Noise
(See also A.3.2)
1
(with low pressure see ##
1)
Nr. PROBLEM
1
Water Leak
2
Oil Leak
Maintenance Guide HPC
Section B – Electrical (Amps)
Nr. PROBABLE CAUSE
1 Nozzle partially blocked.
Inlet
2
dirty/damaged.
3 Valves dirty/damaged.
(Brush
4
(High
worn/faulty.
5 Motor bearings damaged.
6 Incorrect oil level, oil leak.
7 Swashplate worn.
1 Nozzle worn.
too
2 Valves dirty/damaged
Micro leak on high pressure
starts
circuit (from pump outlet to
gun 1
trigger) picked up by TSS
system.
Section C - Noise
Nr. PROBABLE CAUSE
##1 Cavitation.
2 Motor bearings damaged.
3 Contact with motor fan.
4 Oil level low.
Section D - Leaks
Nr. PROBABLE CAUSE
Pump
1
worn/damaged.
O rings on connections between
2
accessories worn/damaged.
3 Gun
4 Water inlet/outlet connectors.
High
5
damaged/faulty.
6 Cracked pump head.
Connector loose (water filter,
7
HPC Hose etc.).
1 Pump oil seals worn/damaged.
2 Pistons worn/damaged.
Oil venting because of high
3 pressure water ingress from the
pump..
Check machine with a new lance, if
confirmed, clean nozzle.
water filter
Clean filter or replace it if damaged.
Clean valves (replacement preferred).
Replace valves using service kit.
motor) Brushes
Replace brushes.
Check/Replace motor (induction motor).
Check/Replace motor-pump ass.y (brush
motor).
(See
Check/Replace swashplate (induction motor).
Check/Replace (complete motor pump ass.y
(brush motor).
(Pressure also low) Check machine with a
new lance, if confirmed, replace lance/nozzle.
(See
Identify the micro-leak and repair.
(See A.1.5-7)
(See
Check fan / contact with fan.
Motor overheating can cause fan to dislodge
from motor shaft allowing contact
Top up oil
Replace pump water seals. Nb. Part subject
to normal wear. Nbb. Use of the pressure
water seals washer even for a brief period without
correct water supply can 'burn' the seals,
damaging them permanently (see User
manual).
Replace O Rings Nb. Part subject to normal
wear.
Check/replace gun. Nb. Part subject to
normal wear.
Check/replace using service kit. Nb. Part
subject to normal wear.
pressure hose Replace hose. Nb. Part subject to normal
wear.
Check/Replace
(induction motor)
Check/Replace motor pump ass.y (brush
motor)
Tighten connector/replace seal.
Check/Replace with piston/seal Service Kit.
(Emulsified oil) Replace all water and oil
seals, check/replace pistons.
9 / 17
REMEDY
D.2).
A.2.2).
REMEDY
B.6.5)
REMEDY
cracked pump
(See B.1.8)
head