Instruction manual
7
6 After the discharge
valve and the spray
gun have been
closed, the
air-driven motor still
moves to-and -fro
regularly.
1) The V-shape sealing ring on
the plunger valve body has
been abraded.
2) The high-pressure valve ports
on the plunger valve, the
suction valve and the
discharge valve are broken.
1) Replace the V-shape ring on the plunger valve
body.
Caution: The V-shape sealing ring should be
replaced in group and as per its quantity and
direction before it is dismantled.
2) Replace the suction valve body, the suction valve
body, the discharge valve body or the steel ball.
7 During spraying,
coating is found in
the oil cup of the
pump base.
The V-shape sealing ring in the
pump base is abraded.
Replace the V-shape sealing ring in the pump base.
Caution: The V-shape sealing ring should be
replaced in group and as per its quantity and
direction before it is dismantled.
Generally speaking, the trouble-shooting should be done step by step. At first, presume some parts are
normal and the others are not, and check the parts you think are faulty. If the checked parts are normal,
check other parts, until all faults are eliminated.
Caution: Before the trouble-shooting and maintenance operation, the air intake ball
valve must be closed and the system must be depressurized by opening the
discharge valve.
6 Equipment Maintenance
6.1 To avoid damaging the high-pressure hose, while using it, do not overbend, stepped on, stress or roll
by wheels.
6.2 To ensure good filtering functions, strainers on the equipment must be maintained and cleaned
regularly（strainers on coating sucker, pressure storing filter, and the inner tube of the pikestaff）.
6.3 When the nozzle hole is blocked, do not stab it with a needle, in case the nozzle lip is damaged and
the atomization quality is affected.
6.4 The pump rods of air-driven pump and plunger pump should be injected with lubricant regularly (in the
43# compacting screw).
6.5 The oil cup in the air-driven dual parts must be filled with 20# engine oil regularly.
7 Spare Parts Packages List
Model DP6391A 30 : 1 & DP6391B 46 : 1
SN Name Specification Quantity
Assembling part
1
46# Kraft V-shape sealing ring
￠51.5 X￠36.5X 6
6
Coating cylinder
2
45# PTFE V-shape sealing ring
￠51.5 X￠36.5X 6
6
Coating cylinder
3 59# pump body washer
￠74 X￠68X 4
1
Coating cylinder
4 66# suction valve washer
￠59 X￠51X 4
1
Coating cylinder
Model DP6391A 45 : 1 & DP6391B 69 : 1
SN Name Specification Quantity Assembling part
1 46# Kraft V-shape sealing ring
￠42 X￠30X 7
6 Coating cylinder
2 45# PTFE V-shape sealing ring
￠42 X￠30X 7
6 Coating cylinder
3 59# pump body washer
￠61.5 X￠30X 7
1 Coating cylinder
4 66# suction valve washer
￠49 X￠45X 4
1 Coating cylinder