
9
INSTALLATION GUIDE
The hydraulic generator system must be installed
properly to operate reliably, quietly, and most
importantly, safely. Read the entire manual and
option instructions before installation.
INSTALLATION CLEANLINESS
CAUTION!
MAINTAIN
OIL
CLEANLINESS
DURING
INSTALLATION. DEBRIS IN A HYDRAULIC
SYSTEM
MAY
DAMAGE
INTERNAL
COMPONENTS
OR
CAUSE
THE
PUMP
COMPENSATOR TO STICK, RESULTING IN
ERRATIC OPERATION.
•
Ensure the work area is free of dirt and always
keep ports plugged until hoses are installed.
•
Filter oil through a 10 micron (or better) absolute
filter before using it in the generator. Even a new
barrel of oil can contain contamination that is
harmful to a hydraulic system.
•
Thoroughly flush hoses before connecting. It is
best to clean your hoses using an air gun like the
one shown below. See the Accessories page in
the Appendix for more information.
Figure 4: Air Gun Projectile Cleaner
HYDRAULIC OIL REQUIREMENTS
Harrison Hydra-Gen, Ltd. recommends a premium
anti wear hydraulic oil to be used in the generator
system. Dextron III
does not
fall in this category.
Dextron is formulated to operate in transmissions.
The weight of the oil is determined by the climate the
system is operating in. Using an
AW46
will provide
good protection in most year round US climate
conditions.
A graph of ISO Oil Grades versus applicable fluid
temperatures is shown below. The lowest allowed
cold start temperature (at 4600 SUS) for each grade is
shown as a triangle. The bar represents the ideal
viscosity range for that fluid (80-170 SUS). The
diamond at the top signifies the upper temperature
limit of the fluid (at 60 SUS). Do not exceed this
limit for a prolonged time period.
Hydraulic Fluid Grade vs. Fluid Temperature
-50
0
50
100
150
200
250
VG 100
VG 68
VG 46
VG 32
VG 22
ISO Oil Grade
F
lu
id
T
e
m
p
e
ra
tu
re
(
°F
)
▲
Co ld Start Temperature (4600 SUS)
█
Optimum Range (80-170 SUS)
♦
♦
♦
♦
M aximum Temperature, Sho rt Term (60 SUS)
Figure 5: Hydraulic Fluid Selection Graph
The operating temperature of the fluid in the
hydraulic generator system is maintained at 120
°
F to
180
°
F, depending on the ambient air temperature and
load. Fluids with a viscosity rating of less than 60
SUS at this temperature are not acceptable. For cold