E-PAC5,8,1.5,HCP-2-1008
Printed in USA
TVW
©2008
Page 9
100 Thomas Johnson Drive, Frederick, MD 21702-4600 USA
Phone (301) 663-1600 • 1-800-638-3326
Fax (301) 663-1607 • 1-800-447-3326
Website: www.edcoinc.com
Email: [email protected]
PILOT VALVE ADJUSTMENT
RESETTING DIFFERENTIAL (2)
Make sure the top toggle lever is positioned as shown. (See Figure 7). Loosen locknut
(1) by turning counter-clockwise several full turns. Gently turn differential setting (2)
clockwise only until the internal rod makes contact with the steel ball inside. After mak-
ing contact, turn differential (2) counter-clockwise 1/4 turn. Hold this position with one
wrench and proceed to top end setting.
TOP END SETTING (4)
Loosen locknut (3) by turning counter-clockwise several full turns. (4) is the top end
setting. Turning (4) clockwise will increase the top end pressure setting. Turning counter-
clockwise will decrease the top end pressure setting. Begin at a low setting by turning
counter-clockwise one full turn. Proceed to fi ne tuning instructions.
FINE TUNING INSTRUCTIONS
Start engine/motor and observe tank pressure gauge. As tank pressure approaches 130
P.S.I.G., the pilot valve should begin unloading at felt muffl er and cause gas engine to
slow down to idle speed. If pilot valve does not unload as tank pressure approaches 130
P.S.I.G., slowly turn top end setting (4) counter-clockwise until pilot starts to unload. If pi-
lot valve starts to unload prematurely (at 100 P.S.I.G.), turn top end setting (4) clockwise
in 1/4 turn increments, tap down on the internal rod at toggle attachment, and repeat
until desired top end setting is reached. If pilot valve begins to rifl e (sputter), fi ne tune dif-
ferential setting (2) 1/16 turn in either direction until rifl ing stops. After fi ne tuning, secure
settings by turning locknuts (1 & 3) clockwise until tight. Hold setting (2 & 4) in place with
one wrench while turning locknuts to secure.
SCHMIDT BELT TIGHTENING DEVICE
To adjust (tighten) belt tension, proceed as follows:
1. Loosen locknuts for engine hold-down bolts only until washers beneath spin freely.
2. Rotate 1/2” adjusting bolt clockwise until desired tension is reached. (See Figure 8).
3. Retighten hold-down bolts.
Felt Muffl er
1
2
3
4
Toggle
Unloader
Valve
1
2
3
4
Figure 7
Clockwise rotation of 1/2” bolt
will increase belt tension
Figure 8
Drive pulleys must be properly aligned and drive
belt tension set to specifi cations. Improper pulley
alignment and belt tension can cause engine
overloading, excessive vibration, and premature
belt and/or bearing failure. (See Figure 9).
DRIVE PULLEYS
Electric
models
only>>>>>>>
Gasoline
models
only
<<<<
Span length
5 pounds of
force to give a
defl ection of 1/64”
per inch of span
Small sheave
diameter
Direction of
force applied
Figure 9
