User guide

Section V - Hydraulics & Hy-Powers • Page 9
ROD LENGTH - VISUAL DIFFERENCE
(MEASUREMENT IS TAKEN FROM FIREWALL SIDE MOUNT TO END OF ROD)
18001810X - 7” Push Rod. Flow Switch has One Prong with Brass Nut.
First Design Rod is Staked and threfore not removable.
Second Design - Rod is Hollow and removable.
18003998X - 5 1/2”, Threaded and Staked. (Non-removable)
18004080X - 9” Fixed Eyelet Rod. Flow Switch is Two Prong, 1/2” Rod
NOTE SIMILARITIES:
• 18001810 & 18003998 BODY AND CASTING ARE THE SAME. CASTING #2623435
NOTE DIFFERENCES:
• 18001810 IS A GM APPLICATION & 18003998 IS A IHC APPLICATION.
Exception: Customer may have GM unit on IHC Application. To advise correctly, never rely on the
casting number alone.
• 18001810 -Inlet has an inverted flare. It is flared at the end of lines. Flow Switch is one prong with
a brass nut to lock into position.
• 18003998 - Push rod is threaded, jointed and always staked. Inlet has a clevis that slides up and
down on the line. Adust the brass jam nut and lock into place.
18001810 OLDER UNITS COMPARED TO NEWER UNITS.
• OLDER UNITS MUST BE TAKEN COMPLETELY OUT. Your rod may be fixed or eyelet, take it off
of the brake pedal. If they have a rubber boot, they are not staked, and are removable.
Make sure to readjust upon re-installing to the brake pedal for the unit to function properly.
• NEWER UNITS ARE REMOVED BY LOOSENING THE FOUR BOLTS, THEN PULLED OFF OF
THE TRUCK. The rod is hollow and has another threaded rod that attaches to the Brake Pedal.
Most units used today are of the newer style, but for our customer’s convenience, we ship
all units with a Rod. If replacing an older unit, a Rod must be available for installation.
18014080
• This unit is unique in that it has a different Casting Number of, 18015765 while the body
style is like the other two units.
• The 18014080 has a fixed eyelet rod (measures 9” to center of fixed rod eyelet) and and
four fixed bolts coming out the back. The unit is sealed differently by having a
BrassTube Seat (not inverted) that accepts an o-ring to lock into position.
• The Flow Switch is 2 Prong, (part number 18020593) with 1/2” Rod.
IDENTIFYING DELCO HYDRAULIC ACTUATED UNITS
SECTION V-2 ... DELCO HY-POWERS