Replacing The Hydraulic Filter - Toro STX-38 Operator's Manual

High Viscosity Index/Low Pour Point Anti-wear Hydraulic
Fluid, ISO VG 46
Material Properties:
Viscosity, ASTM D445
Viscosity Index ASTM
D2270
Pour Point, ASTM D97 -37°C to -45°C (-34°F to -49°F)
FZG, Fail stage
Water content (new
fluid):
Industry Specifications:
Vickers I-286-S, Vickers M-2950-S, Denison HF-0, Vickers
35 VQ 25 (Eaton ATS373-C)
The proper hydraulic fluids must be specified for mobile
machinery (as opposed to industrial plant usage), multi-weight
type, with ZnDTP or ZDDP anti-wear additive package (not
an ashless-type fluid).
Important: Many hydraulic fluids are almost colorless,
making it difficult to spot leaks. A red dye additive for
the hydraulic system oil is available in 20 ml (2/3 fl oz)
bottles. One bottle is sufficient for 15 to 22 L (4 to 6 US
gallons) of hydraulic oil. Order part 44-2500 from your
authorized Toro distributor.
1. Park the machine on a level surface and lower the
grinder.
2. Stop the engine, remove the key, and allow the engine
to cool.
3. Look into the glass bubble on the right side of the
machine. If you cannot see hydraulic fluid in the
bubble, continue this procedure to add fluid.
Figure 58
1. Hydraulic fluid check bubble
4. Remove the cover plate; refer to
Cover (page 20).
5. Clean the area around the filler neck of the hydraulic
tank and remove the cap and filter from the filler neck
using a socket (Figure
cSt @ 40°C (104°F) 44 to 48
cSt @ 100°C (212°F) 7.9 to 9.1
140 or higher
11 or better
500 ppm (maximum)
Removing the Front
59).
1. Filler neck cap
6. If the level is low, add fluid until it is visible in the glass
bubble.
7. Install the cap and filter on the filler neck and torque
bolt on top to 21 to 25 N-m (200 to 240 inch-lb).
8. Install the cover plate; refer to
Cover (page 21).

Replacing the Hydraulic Filter

Service Interval: Every 200 hours
1. Position machine on a level surface.
2. Lower the grinder.
3. Stop the engine, remove the key, and wait for all moving
parts to stop before leaving the operating position.
4. Remove the top cover.
5. Remove and discard the old filter
1. Filler cap
2. Hydraulic filter
6. Install the replacement hydraulic filter and filler cap
(Figure 60) and torque bolt on top to 21 to 25 N-m
(200 to 240 inch-lb).
7. Clean up any spilled fluid.
8. Install the top cover.
37
Figure 59
2. Hydraulic fluid filter
Installing the Front
(Figure 60).
Figure 60