AGP 700W Mechanical, Instruction Manual

17

To clean:

1.

  Remove the suction tube (73) by releasing the 

hose clip (71) and pulling the hose free. Use a 
wrench to loosen the gland nut.  

2.

  Remove the check ball and ball guide and 

clean all related parts.

3.

  Replace in the reverse of assembly and 

tighten.

PUMP PACKINGS

The packings are a wearing part. If the pump can 
no longer maintain pressure, has diffculty priming 
and paint seeps into the throat of the pump, and 
tightening the packing nut no longer helps, then 
the packings will require replacement. This is best 
entrusted to a qualified repair technician. 
To remove the pump and replace the packings, 
follow the instructions below:

PUMP REMOVAL

1.

  Remove the suction tube by releasing the 

hose clip and pulling the hose free.

2.

  Turn the pump until the piston is at its lowest 

point. To do this, it is necessary to remove the 
left side frame leg (77) and then remove the 12 
screws to remove the left side motor housing 
(38). Then the motor may be turned by turning 
the fan from the rear.

3.

  Loosen and remove the 4 socket cap screws 

(65) 

4.

  Pull the pump forward to disengage the 

displacement piston (53) from the slot in the 
bottom of the drive piston (45). (It must be at 
its lowest point in order to disengage-see step 
2 above)

5.

The pump unit may now be lifted away.

6.

  Replacement is the reverse of removal. Grease 

the junction slot of the drive piston when 
assembling.

PACKINGS REPLACEMENT 

1. 

Loosen the packing nut with the tommy bar 
supplied and remove.

2. 

Pull out the piston.

3. 

Remove all parts and clean. Clamp the 
displacement piston (53) in the soft jaws of a 
vise and remove the ball seat fastener (56) to 
allow removal of the small ball seat (54) and 
the small check ball.

4. 

Discard all old packings.

5. 

Soak the new leather packings in W30 oil for at 
least one hour before assembling.

6. 

Replace the packings, glands, o-rings and 
check balls with the new parts from the 
rebuild kit. Strictly follow the exact order and 
orientation.

7. 

Replace piston and thread on the packing nut. 
After resistance from the disc springs is felt, 
tighten the packing nut a further 3/4 turn. 

46

56

54

55

53

52

49

48

47

44

43

57

70

69

67

66

65

50

58

59

68

51

45

64

74

71

62

63

60
61

72

73

85 

A1

OPTIONAL  to 58

A2

A3

A4

A5

A6

A7