HP TWIN8 User Manual ◄ 11
QUICK DISCONNECT COUPLERS
HTMA-approved quick disconnect couplings are
installed to hydraulic hoses so that the direction of
oil ow is always from the male to the female quick
disconnect as shown on “Hose Recommendations” on
page 9. Quick disconnect couplings and hose ttings
are selected so that additional ttings such as reducer or
adapter ttings are not required.
If adapter ttings are used, they must be approved steel
hydraulic ttings meeting a minimum operating pressure
rating of 2500 psi/172 bar. Do not use galvanized pipe
ttings or black pipe ttings.
Use thread tape or pipe joint compound when installing
quick disconnect couplings to hose or tool ttings. Follow
the instructions furnished with the selected thread
sealant. DO NOT OVERTIGHTEN THE FITTINGS.
PREPARATION FOR USE
Do not operate the power unit until you have read the engine
operating and maintenance instructions manual furnished
with the unit.
1. ENGINE CRANKCASE OIL LEVEL
Always check the oil level before starting the engine. Make
sure the oil level is at the FULL MARK on the dipstick. Do not
overll. Use detergent oil classied “For Service SF, SG, SH,
SJ or higher” as specied in the engine operators manual. Do
not use special additives. Outdoor temperatures determine
the proper oil viscosity for the engine. Use the chart to
select the best viscosity for the outdoor temperature range
expected.
* Below 40°F (4°C) the use of SAE 30 will result in hard
starting.
** Above 80°F (27°C) the use of 10W-30 may cause
increased oil consumption. Check oil level more
frequently.
2. ENGINE FUEL LEVEL
Check the fuel level. If low, ll with clean, fresh unleaded
gasoline with a minimum of 87 octane. Gasoline with up to
10% ethanol (gasohol) is acceptable.
3. HYDRAULIC CONNECTIONS
The recommended hose length is 25 ft/8 m with a 1/2
inch/12.7 mm inside diameter. The hoses must have
a working pressure rating of at least 2500 psi/175 bar.
Each hose end must have male thread ends compatible
with HTMA (Hydraulic Tool Manufacturers Associations)
quick disconnect ttings (NPT type threads).
°F °C
104 40
86 30
68 20
50 10
32 0
14 -10
-4 -20
-22 -30
PREPARATION FOR USE
Brand Biodegradable Description
CITGO No Hydurance AW32
AMS Oil No HVH 32
Exxon Mobil No Univis HVI26*
Exxon Mobil No DTE 10 Excel
Shell No S2 V 32
Chevron No Rando HDZ 32
Conoco Phillips No Unax AW-WR-32
Clarion (CITGO) Yes Green Bio 32
Exxon Mobil Yes EAL 224H
Chevron Yes Clarity AW32
Terresolve Yes Envirologic 132
Shell Yes Naturelle HF-E-32
3. HYDRAULIC FLUID
RECOMMENDED HYDRAULIC OILS
Below is a list of recommended oils by brand.
*Recommended for extreme cold temperatures
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