Gravely Promaster 160 Owner's/Operator's Manual page 22

1
1. Eye-Bolt
4. Lower mower deck all the way down.
5. Remove link chains from mower lift arms (Figure 21).
6. Remove mower mounting arms from frame.
7. Slide mower deck out from under unit.
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1
1. Link Chain
2. Mower Mounting Arm
Figure 21
Installing the Mower Deck (Figure 21)
1. Slide mower deck under unit.
2. Install mower mounting arms on frame.
3. Install link chains on the mower lift arms.
NOTE: Perform steps 4 and 5 for mechanical lift mower
decks only (991009, 010, 011, 013, 015, 016, 017, 018, 019,
020).
4. Raise mower deck to transport position (see Mower Lift
Pedal (991009, 010, 011, 013, 015, 016, 017, 018,
019, 020) on page 11).
5. Install mechanical lift spring on each side of unit
(Figure 20).
6. Install PTO belt on electric clutch (see Replacing
Mower Belts on page 20).
7. Level mower deck (see Leveling the Mower Deck on
page 22).
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2. Mechanical Lift Spring
Figure 20
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3. Mower lift Arm
Leveling the Mower Deck
These adjustments should be made on a level surface with
the tires inflated to the correct air pressure.
Check Blade Level and Pitch
1. Raise mower deck to a 3 in. (7.62 cm) cutting height.
2. Shut off engine. Engage parking brake. Remove the
ignition key.
NOTE: Place blocks under the bottom edge of the deck, not
under the reinforcement bar welded along deck face.
3. Place blocks at each corner of the deck to support the
OF4040
weight of the deck.
4. Turn the blades so the blade ends point left to right
across the width of the deck.
5. Measure the distance between the ground and cutting
edge of the blade on the left blade (Left position in
Figure 22) and on the right blade (Right position in
Figure 22). Distances should be within 3/16 in.
(4.7 mm). If they are not, raise the low side of the deck
using the height adjusters on the deck lift brackets (see
Figure 23).
6. After deck is level side to side, check the deck front to
back pitch.
7. Turn the blades so the blade ends point front to back
as shown in Figure 22.
8. Measure the distance between the ground and the
cutting edge of the middle blade at the front of the deck
(Front position in Figure 22) and between the ground
the cutting edge of the left and right blades at the rear
of the deck (Rear position in Figure 22).
9. The cutting edge at the front of the deck (Front position
in Figure 22) should be 1/8 in. (3.18 mm) lower than
the cutting edges at the rear of the deck (Rear position
in Figure 22).
10. If measurements are out of range, raise the low side of
the deck using the height adjusters on the deck lift
brackets (see Figure 23). Be sure to raise the deck
evenly to keep the deck level side to side.
NOTE: Pitching the front of the blades lower than the rear
provides a balance between cut quality and the power
needed to cut grass. Certain cutting conditions require the
deck to be pitched with the rear of the blades lower than the
front. Heeling the deck this way requires more engine power
but can provide better cut quality.
11. Remove the blocks from under the deck.
GB - 22