Tennant 235, Operator'S Manual

Page: 44 / 82

MAINTENANCE
235 MM166 (3--94)
3-8
HYDRAULICS
HYDRAULIC FLUID
The quality and condition of the hydraulic fluid
play a very important role in how well the machine
operates. TENNANT’s hydraulic fluid is specially
selected to meet the needs of TENNANT
machines.
TENNANT’s hydraulic fluids provide a longer life
for the hydraulic components. There is one
recommended fluid.
TENNANT part no. Fluid Weight
65870 5--20W
If a locally-available hydraulic fluid is used, make
sure the specifications match TENNANT hydraulic
fluid specifications. Using substitute fluids can
cause premature failure of hydraulic components.
European marketed machines are filled with
locally available hydraulic fluids. Check the label
on the hydraulic fluid reservoir.
ATTENTION! Hydraulic components depend
on system hydraulic fluid for internal
lubrication. Malfunctions, accelerated wear,
and damage will result if dirt or other
contaminants enter the hydraulic system.
HYDRAULIC FLUID RESERVOIR
Hydraulic fluid is stored in the hydraulic fluid
reservoir. It holds 3.9 gal (14.8 L) of hydraulic
fluid. The reservoir is located under the seat
support.
The fluid level is checked by looking at the
dipstick on the breather-filler cap with the hopper
in the sweeping position. The reservoir is full
when the fluid level is above the “ADD”mark on
the dipstick.
A
B
03502
HYDRAULIC FLUID RESERVOIR
A. Reservoir
B. Breather-Filler Cap
Check the hydraulic fluid level at operating
temperature every 100 hours of operation.
Change the hydraulic fluid after every 400 hours
of operation. Do not overfill the hydraulic fluid
reservoir. Hydraulic fluid expands as it heats to its
normal operating temperature. Always allow for
expansion when filling the reservoir. Lubricate the
filler cap gasket with a film of hydraulic fluid
before putting the cap back on the reservoir.
HYDRAULIC FILTER
The hydraulic fluid filter keeps the machine
hydraulic system clean to a level of 10 microns.
The hydraulic fluid filter is located next to the
vacuum fan.
Replace the hydraulic fluid filter element after the
first 50 hours of operation and then after every
400 hours of operation.