HYD-7-600 Page 8
SECTION 2
INSTALLATION
MOUNTING
Drilling clearance holes for ½
” bolt size is required to mount the Hydrapak (see bolt pattern on page 11).
Mounting hardware includes rubber isolation washers, flat washers, lock washers, and hex huts.
HYDRAULIC HOSES & FITTINGS
All high pressure hoses & fittings must have a working pressure rating equal to or higher thank
the hydraulic system relief valve setting.
·
Suction line rotation must not rise above the oil level height in reservoir at any location.
This may cause severe hydraulic pump cavitation which will reduce the hydraulic pump life
·
Do not use thread tape or sealant on hydraulic fittings as this can contaminate hydraulic
system
.
NOTICE
SUCTION LINE SIZING & ROUTING
·
Pressure drop calculations must be performed on the specific system and corresponding
tractor unit to insure acceptable suction conditions.
·
The routing of the suction line must be done to avoid excessive pressure drop. Elbows,
reducers, and line rises above the bottom of Hydrapak reservoir will cause excessive
pressure drop in suction line.
·
The maximum recommended vacuum at the hydraulic pump inlet is 5” Hg. For gear pumps
and 2” Hg. for piston pumps.
·
The suction hose must be capable of operating under 28” Hg. Vacuum.
Special attention should be given to applications utilizing a double suction or large diameter piping. When
excessive loading or insufficient support of the suction piping exists, reservoir fatigue fractures, loss of oil,
and decreased hose life are likely to occur.
1. For double suction applications, if weight and length of pipe work (fittings) is excessive, shorten
the piping to reduce vibration and add support brackets to compensate for the added weight.
Additional support brackets should be attached to a common point with the Hyrdrapak so that
flexing of the truck frame and vibration does not induce additional stress on the Hydrapak.
2. . On direct coupled double suction piping, if mounting conditions do not accommodate additional
support brackets, consider line mounting a pipe "Y" to fill the need for a double suction. When line
mounting the "Y", a single section of large diameter hose can be fitted to the reservoir suction
fitting leading into the "Y" downstream. Appropriately sized piping can then exit the "Y" and lead
into the pump inlet sections. Always make sure the "Y" pipe is supported and consideration is
given to the remaining points.
