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Maintenance 

14

308360D

Disassemble the Displacement 
Pump

When disassembling the pump, lay out all the removed 
parts in sequence, to ease reassembly.

NOTE:

 Packing Repair Kits are available. For the best 

results, use all the new parts in the kit. Kit parts are 
marked with *. You can also convert the pump to 
different packing materials. See 

Packing Kits

, page 21.

1. Place the pump lengthwise in a large vise, with the 

jaws on the outlet housing (7) as shown in F

IG

. 3, 

page 15. Using the supplied wrench (110), loosen, 
but do not remove, the packing nut (2).

2. Apply a pipe wrench to the flats of the intake valve 

(19) from the intake housing (18). Be careful to 
catch the intake ball (17) as you remove the intake 
valve, so that it does not fall and suffer damage. 
Remove the seal (8) from the intake valve. Inspect 
the ball and the seat (BS) of the intake valve for 
wear or damage.

3. Apply a pipe wrench to the hex of the valve housing 

(18). The pump assembly may separate at joint A or 
joint B.

If the assembly separates at joint A:

a. Unscrew the valve housing (18) from the 

cylinder. 

b. Using a rubber mallet, drive the displacement 

rod (1) and piston assembly out of the outlet 
housing (7) and cylinder (9) until the piston 
comes free. Pull the rod and piston from the 
cylinder, being careful not to scratch the parts.

c. Unscrew the cylinder (9) from the outlet housing 

(7), using a pipe wrench. 

d. Remove the two seals (8) from the cylinder. 

Shine a light into the cylinder (9) to inspect the 
inner surface for scoring or wear. 

e. Proceed to step 6.

If the assembly separates at joint B:

a. Unscrew the cylinder (9) and valve housing (18) 

from the outlet housing (7). 

b. Gently pull the cylinder and valve housing 

straight out of the outlet housing; the 
displacement rod (1) and piston assembly will 
come out with these parts.

c. Place the valve housing (18) in the vise and 

unscrew the cylinder (9) from the housing, using 
a pipe wrench. The displacement rod (1) and 
piston assembly will remain in the cylinder.

d. Using a rubber mallet, drive the displacement 

rod (1) and piston assembly out of the cylinder 
(9) until the piston comes free. Pull the rod and 
piston from the cylinder, being careful not to 
scratch the parts.

e. Remove the two seals (8) from the cylinder. 

Shine a light into the cylinder (9) to inspect the 
inner surface for scoring or wear.

f.

Proceed to step 6.

4. Place the flats of the piston seat housing (16) in a 

vise, as shown in F

IG

. 4, page 15.

5. Using an adjustable wrench, unscrew the piston ball 

housing (10) from the piston seat housing. Be 
careful to catch the piston ball (11) as you separate 
the piston seat housing and ball housing, so that it 
does not fall and suffer damage.

6. Examine the displacement rod (1) for scratches or 

other damage. Only if the rod needs replacement, 
unscrew it from the piston ball housing (10), using 
an adjustable wrench on the flats of the rod.

7. Remove the glands and v-packings (PV) from the 

piston seat housing (16). Inspect the ball (11), and 
the seat (PS) and guides (PG) on the housing for 
wear or damage. See F

IG

. 5, page 18.

8. Unscrew the packing nut (2) from the outlet housing 

(7). Remove the glands and v-packings (OV). See 
F

IG

. 5, page 18.

9. Clean all parts with a compatible solvent and 

inspect them for wear or damage.

NOTICE

To reduced the possibility of damage to the rod (1) 
and cylinder (9), always use a rubber mallet to drive 
the rod out of the cylinder. Never use a hammer to 
drive out the rod,

Summary of Contents for Dura-Flo 1200

Page 1: ...i 0 7 MPa 7 bar Maximum Air Input Working Pressure 237517 Pump Series A 13 1 Ratio with Senator Air Motor 1300 psi 9 MPa 90 bar Maximum Fluid Working Pressure 100 psi 0 7 MPa 7 bar Maximum Air Inlet W...

Page 2: ...ired Tools 12 Disconnect the Displacement Pump 12 Connect the Displacement Pump 12 Disassemble the Displacement Pump 14 Assemble the Displacement Pump 16 Parts 19 Packing Kits 21 Performance Charts 22...

Page 3: ...when equipment is not in use Check equipment daily Repair or replace worn or damaged parts immediately with genuine manufacturer s replacement parts only Do not alter or modify equipment Alterations...

Page 4: ...ug power cords or turn power or light switches on or off when flammable fumes are present Use only grounded hoses Hold gun firmly to side of grounded pail when triggering into pail Do not use pail lin...

Page 5: ...hen flushing or relieving pressure hold metal part of the spray gun dispense valve firmly to the side of a grounded metal pail then trigger the gun valve Accessories Install the following accessories...

Page 6: ...r line drop to drain off moisture Second bleed type air valve K isolates the air line accessories for servicing NOTE Locate upstream from all other air line accessories Fluid Line Fluid filter L with...

Page 7: ...equired for pump F Pump air regulator G Air manifold H Electrically conductive air supply hose J Air line filter K Bleed type master air valve for accessories L Fluid filter M Fluid drain valve requir...

Page 8: ...e Equipment Flush before fluid can dry in the equipment at the end of the day before storing and before repairing equipment Flush at the lowest pressure possible Check connectors for leaks and tighten...

Page 9: ...as a priming valve until the fluid flows from the valve Close the valve NOTE When changing fluid containers with the hose and gun already primed open the drain valve M to help prime the pump and vent...

Page 10: ...f Procedure page 8 2 Follow Flush the Equipment page 8 NOTICE Always use the lowest air pressure necessary to get the desired results Higher pressures cause premature tip and pump wear NOTICE Always f...

Page 11: ...he displacement rod Clean the rod always stop the pump at the bottom of its stroke keep the wet cup 1 3 filled with a compatible solvent Motor parts are dirty worn or damaged Clean or repair see the s...

Page 12: ...reconnects it to the motor 3 Screw the nuts 108 onto the tie rods 105 Torque the nuts to 81 89 N m 60 66 ft lb 4 Screw the coupling nut onto the motor shaft MS loosely Hold the motor shaft flats with...

Page 13: ...intenance 308360D 13 FIG 2 Model 237516 Shown Torque to 136 149 N m 100 110 ft lb 1 2 Torque to 196 210 N m 145 155 ft lb Torque to 81 89 N m 60 66 ft lb 3 V 108 U 109 2 1 106 107 MS 110 105 101 1 2 3...

Page 14: ...ing 18 from the outlet housing 7 b Gently pull the cylinder and valve housing straight out of the outlet housing the displacement rod 1 and piston assembly will come out with these parts c Place the v...

Page 15: ...IG 3 FIG 4 03794A BS 19 17 8 Joint A 2 1 7 9 18 Joint B Torque to 325 353 N m 240 260 ft lb 1 2 Lubricate Torque to 190 217 N m 140 160 ft lb 3 1 1 2 2 3 03793A 1 10 16 1 10 11 16 Torque to 386 407 N...

Page 16: ...erial see Packing Kits page 21 6 Apply anti seize 20 and install the packing nut 2 loosely into the outlet housing 7 7 Lubricate the piston packings Slide the displacement rod 1 and piston assembly do...

Page 17: ...N m 240 260 ft lb This will torque both cylinder joints A and B See FIG 3 page 15 17 Using a pipe wrench torque the intake valve 19 to 190 217 N m 140 150 ft lb See FIG 3 page 15 18 Torque the packin...

Page 18: ...Packing Detail at left Torque to 190 217 N m 140 160 ft lb 1 2 7 OV 10 9 18 16 SS 17 BS 8 11 PG PS PV 8 14 5 2 Ref 4 3 6 7 Ref 10 Ref 9 Ref 16 Ref 13 12 15 18 Ref 8 Ref 6 4 6 4 5 4 5 4 4 4 3 2 3 9 7 1...

Page 19: ...1 Replacement safety labels tags and cards are available at no cost These parts are included in Connection Kit 235417 For applications requiring stainless steel tie rods order Connection Kit 235418 1...

Page 20: ...ball piston stainless steel 1 11 102972 BALL piston stainless steel 0 875 in 22 2 mm diameter 1 16 222951 HOUSING seat piston valve stainless steel with tungsten carbide seat 1 17 108001 BALL intake...

Page 21: ...t male stainless steel 1 13 184230 GLAND piston male stainless steel 1 14 109310 V PACKING piston PTFE 5 15 184180 GLAND piston female stainless steel 1 20 123174 ANTI SEIZE not shown 1 0805 0806 14 1...

Page 22: ...ow right to scale to read air consumption NOTE Recommended pump speed for continuous operation to shaded area is 60 cpm Model 237516 Bulldog Pump Model 237517 Senator Pump Key Black Curve Fluid Outlet...

Page 23: ...64 in 94 28 mm 3 712 in 11 1 mm 0 437 in DIA 4 94 28 mm 3 712 in 0653 Three M16 x 2 0 Holes Pump Model A B C D E F G 237516 1134 mm 44 65 in 590 mm 23 23 in 544 mm 21 42 in 257 mm 10 12 in 2 in np f 1...

Page 24: ...0 mm Displacement pump effective area 1 86 in 2 12 cm2 Maximum pump operating temperature 180 F 82 C Air inlet size 3 4 npsm f Fluid inlet size 2 in npt f Fluid outlet size 1 in npt f Weight 240 lb 10...

Page 25: ...in 2 12 cm2 Maximum pump operating temperature 180 F 82 C Air inlet size 3 4 npsm f Fluid inlet size 2 in npt f Fluid outlet size 1 in npt f Weight 240 lb 109 kg Wetted parts 316 440 and 17 4 PH Grad...

Page 26: ...material or workmanship repairs will be made at a reasonable charge which charges may include the costs of parts labor and transportation THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRAN...

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