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H.E.R.O. INDUSTRIES 300S / 300SL LEGEND Owner’s Manual
24
1 Open prime valve, (ref# 34) in order to release pressure from the material side of
pump.
2 Remove pressure control knob, (ref# 74) and pull P.C. stem, (ref# 77) out to internal
stop, thereby releasing hydraulic pressure.
3 Disconnect outgo tee, (ref# 33) from outgo swivel, (ref# 30) on the outgo valve.
4 Remove outgo valve from machine by turning counter clockwise.
5 Invert valve and secure upper part of valve, (ref# 29) in vise.
6 Remove lower half of valve, (ref# 23).
7 Remove crush washer, (ref# 24), seat, (ref# 26), ball, (ref# 26), cage, (ref# 27) and
spring, (ref# 28). Clean and inspect all parts for wear. Replace any worn parts.
8 Apply Teflon tape to threads of outgo upper body.
9 Place spring, large end first, into outgo body. Spring should fit into slot machined
into tunnel.
10 Place cage onto spring, with open end up.
NOTE: Cage should be open so that it drags down the sides of the tunnel during
installation. If closed too much it will trap the ball and cause pulsation in spray
pattern.
11 Place ball into cage.
12 Install seat, beveled side down to ball. Seat should fit snugly into outgo body. Press
on seat to ensure it will compress until it is flush with outgo body. Release slowly to
ensure the parts do not dislodge themselves.
13 Place crush washer on seat. Replace crush washer if badly crushed.
14 Thread outgo lower onto outgo upper until finger tight. Tighten 1/2 turn with
wrench. NOTE: Teflon tape or pipe sealant should be used.
15 Attach repaired valve to machine, installing a new crush washer, (ref# 21) following
steps 3-4 in reverse order.
SPECIAL NOTES:
♦ To check the ball for wear, place against a new seat and check sealing edge against a
bright light.
♦ A used seat may be checked in a similar manner using a new ball. Replace used part
if light pass at sealing edge.
29
21
23
24
25
26
27
28
Outgo
swivel
ref# 30
OUTGO VALVE
Tools or Supplies Required
♦ Vise ♦ 5/8” Open end wrench
♦ 11/16” Open end wrench ♦ 1” Open end wrench
♦ Teflon Tape or pipe sealant.