Graco SaniForce 515, Instructions For Use Manual

Page: 16 / 28

Service
16 3A1973L
Ball Check Valve
Disassembly
NOTE:
• PTFE o-rings should be replaced every time mani-
folds are removed.
1. Relieve the pressure. Disconnect all hoses.
2. Remove the pump from its mounting.
3. Remove the clamps (12) holding the outlet manifold
(2) to the fluid covers (1). See F
IG
. 6.
4. Remove the o-rings (13), seats (31), and balls (16).
5. Remove the clamps (12) and the inlet manifold (3).
Remove the o-rings (13), seats (31), and balls (16).
Reassembly
NOTE: When instructed to lubricate, apply appropriate
waterproof sanitary lubricant.
1. Clean all parts and inspect for wear or damage.
Replace parts as needed.
2. Reassemble in the reverse order, following all notes
in F
IG
. 6, page 15. Be sure the ball checks and man-
ifolds are assembled exactly as shown. The arrows
(A) on the fluid covers (1) must point toward the
outlet manifold (2).
Standard Diaphragms
NOTE: If your pump uses overmolded PTFE dia-
phragms, see page 18.
Disassembly
1. Relieve the pressure.
2. Remove the manifolds and disassemble the ball
check valves as explained at left.
3. Remove the nuts (34) and the grounding strip (8),
then remove the clamps (6) holding the fluid covers
(1) to the air covers (21). Pull the fluid covers (1) off
the pump. See F
IG
. 6.
4. Loosen but do not remove the diaphragm shaft bolts
(14), using a 10 mm socket wrench on both bolts.
5. Unscrew one bolt from the diaphragm shaft (105)
and remove the o-ring (15), fluid side diaphragm
plate (23), diaphragm (20), backer (24) used only on
PTFE models, and air side diaphragm plate (25).
See F
IG
. 7.
6. Pull the other diaphragm assembly and the dia-
phragm shaft (105) out of the center housing. Hold
the shaft flats with a 19 mm open end wrench, and
remove the bolt (14) from the shaft. Disassemble
the remaining diaphragm assembly.
7. Clean all parts and replace o-rings as needed.