Gravely Lawn Mower 11362 User Guide

OPERATOR'S  
MANUAL  
NAME: 40" COMMERCIAL MOWER  
PART NUMBER(S): 11362 - 40" Commercial Drive  
11368 - 40" Commercial Deck  
40" COMMERCIAL MOWER ATTACHED TO C12 TRACTOR WITH DUAL WHEELS  
GENERAL  
Blades:  
2 steel,  
20-1/2" length, 3/16" thick  
hi-strength,  
hi-lift,  
1. The 40" Commercial Mower is a front mount unit  
designed and built to give many years of excellent  
service. The mower is recommended for rough  
mowing conditions; has all gear drive from engine to  
mower, heavy-duty steel deck, rugged skids and  
casters, and 2 adjustable blades. The mower  
attaches to both 2 and 4 wheel tractors (see  
paragraph 3).  
Features: Adjustable casters, adjustable swivel  
action.  
Purpose: Heavy mowing conditions.  
Recommended for the following tractors:  
7.6 - C10A - C12  
424 - 430 - 432  
810 - 812 - 814 - 816S  
Required attaching kits:  
7.6 - C10A - C12: None  
424 - 430 - 432:  
2. The Owners Manual includes the parts list, setting  
up the mower, safety, operation, and maintenance  
instructions. Use the parts list for reference to  
individual part numbers. If further information is  
necessary contact the local Gravely dealer.  
15840E1 Front Drive Kit  
11601E1 Front Adapter Kit  
810-812-814-816S:  
19075E1 Front Drive Kit  
11601E1 Front Adapter Kit  
3. Height: 15-1/2" Weight: 182 lbs.  
Length: 34-3/4" Width: 42"  
Cutting Width: 40"  
Recommended optional equipment for special  
applications:  
Deck: Reinforced, welded steel.  
Drive: Right angle bevel gear, tapered roller  
bearings, cast iron housing, 2 self  
adjusting spring tensioned V-belts.  
7.6 - C10A - C12: None  
Riding Tractors:  
20181E1 Wheel Brake Kit, 800 Series  
11924E1 Front Wheel Weights  
Recommend option for riding tractors without  
hydraulics:  
11271E1 Lift Assist Kit  
1
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ASSEMBLY  
1.  
2.  
3.  
Unpack the drive and deck.  
7. Bolt the drive to the deck. The 2 carriage bolts  
are inserted from under the deck, fig 1, Items 41,  
42 & 43. Be sure that the heads seat properly in  
the deck. The 3 hex bolts fasten from the top, fig  
1, Items 29 & 40. Start all bolts and nuts before  
tightening.  
Remove the belt covers, fig 1, Items 27.  
Mount the idlers on the studs as in fig 2. Note the  
different sleeve lengths of the idlers. The short  
sleeve goes next to the high rotor and the tall  
sleeve goes next to the low rotor. Set the idlers  
on the studs with the extended sleeves down.  
Work from the rear of the mower.  
fig 4  
8.  
9.  
Working from the sides, grip the springs with a spring  
puller or clamp-lock pliers or equivalent. Extend the  
spring hook up, over, and through the spring hole.  
The belts are now in tensioned running position;  
dotted lines fig 4.  
fig 2  
4.  
Set the belts as in fig 3; low belt first. This belt  
positioning is important for ease of assembly.  
Replace the belt covers.  
10. Install the bushings in the caster wheels and  
bolt the wheels in the caster forks.  
LUBRICATION  
1.  
Grease the spindle bearing weldment housing through  
the grease fitting, with general purpose grease fig 1,  
Item 8 & 24. Add grease until it comes out the vent  
hole; opposite side of the grease fitting. Re-grease  
every 8 HOURS of operation or more often when  
operating in severe dust or sand.  
2.  
Grease the bronze bearing and caster wheels through  
the grease fittings with general purpose grease fig 1,  
Items 38 & 49. Add grease until it comes out the  
bearings. Re-grease periodically, especially when  
operating in severe dust or sand.  
fig 3  
5.  
6.  
Hook the springs to the idler assembly from  
underneath as in figs 2 & 4, solid lines.  
Set the drive in position on the deck; do not bolt  
it down. Slip the belts on the drive pulley and  
then on the rotor pulleys. Let the idlers float at  
this time; solid lines, fig 4.  
3
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fig 5  
21  
22  
23  
24  
12862P1 Gear, Bevel  
120502 Key, Woodruff 3/16 x 7/8 Hard  
13187P1 Ring, Retaining  
ITEM  
N0.  
PART N0. DESCRIPTION  
181618 Bolt, Hex 5/16-24 x 1-3/4  
13412P1 Nut, Lock Esna 5/8-18 Light Thin  
12871P1 Spring  
12867P1 Plate, Dog  
12870P1 Washer, Friction  
12869P1 Plate, Drive  
1
2
3
4
5
6
7
8
9
14101P1 Shim, Gear .020  
12490P1 Shim, Gear House .005  
12491P1 Gasket  
10499P1 Plug, Pipe 2 In. W/Filler Plug  
9236P1 Housing, 42 In. Mower  
103877 Plug, Pipe 1/8 In. Sq. Hd.  
119120 Pin, Cotter 3/32 x 1-1/4  
125384 Nut, Slotted 5/8-18 Hex Thick  
12850P1 Gear, Bevel  
25  
26  
27  
28  
29  
30  
31  
32  
33  
12868P1 Plate, Back  
18277P1 Nut, Lock Esna 5/16-24 Light Thin  
13143P1 Bearing, Race  
13144P1 Bearing, Cone  
13122P1 Seal, Oil  
12550P1 Retainer, Oil Seal  
11815P1 Shaft, Housing  
9229P1 Bolt, Hex Special  
12852P1 Shim, Gear  
10  
11  
12  
13646P1 Shim, Gear .010  
13142P1 Bearing, Roller Cone  
13139P1 Bearing, Roller Cone  
13171P1 Seal, Oil (Dual Lip)  
11363P1 Shaft, Drive Rotor  
11366A1 Plate, Mounting Weldment  
120384 Washer, Lock 1/2 Spring  
120378 Nut, Hex 1/2-13  
34  
35  
36  
37  
38  
39  
40  
41  
42  
13 94110100 Fitting, Lube 1/8  
14  
15  
16  
17  
18  
19  
20  
435507 Nut, Lock 1/2-13 Washer Insert Hex  
180193 Bolt, Hex 1/2-13 x 3-3/4  
180122 Bolt, Hex 3/8-16 x 1  
138542 Washer, Lock 3/8 Int Tooth  
12023P1 Casting, Swivel  
12566P1 Shaft, Drive  
13145P1 Bearing, Roller Race  
13146P1 Bearing, Roller Cone  
11364P1 Sheave, Drive  
11365P1 Nut, Special  
NS 10102A1 Attachment Clutch Assembly  
ILLUSTRATED PARTS LIST (Cont.)  
4
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3.  
4.  
Remove filler plug and level plug, fig 6 . Fill the  
gear drive housing to the oil level plug with SAE  
90 gear lubricant. Replace the plugs. Check the  
level periodically especially if signs of leakage  
are present.  
2.  
3.  
7.6, C10A, C12 TRACTORS:  
The mower attaches to the front of the tractors  
with 2 nuts and 2 bolts. Do not damage the  
threaded studs, fig 7.  
Grease the swivel casting through the grease  
fitting on the casting with general purpose  
grease. Add grease until it comes out under the  
swivel adjustment fig 6. Re-grease every 8  
HOURS of operation.  
RIDING TRACTORS:  
The mower attaches to the Front Adapter Kit with  
2 nuts and 2 bolts. Do not damage the threaded  
studs, fig 8.  
fig 8  
SAFETY  
fig 6  
DRIVE UNIT  
1.  
REFER to the tractor Owners Manual to  
familiarize yourself with all controls before  
operation.  
INSTALLATION  
1.  
Before attaching or detaching the mower,  
STOP the engine, put the PTO control in the  
"OUT" position.  
2.  
3.  
DO NOT ALLOW PASSENGERS to accompany  
operator at any time.  
DO NOT ALLOW CHILDREN to operate  
equipment, nor allow adults to operate it without  
proper instruction.  
4.  
INSPECT WORK AREA for rocks, glass, metal,  
bones, and any other foreign objects. Stay alert  
for holes and other hidden hazards.  
5.  
6.  
7.  
8.  
USE EXTREME CAUTION when operating on  
slopes.  
REDUCE SPEED on all side slopes and sharp  
turns.  
DO NOT OPERATE equipment except from  
proper operator's position.  
KEEP SAFETY devices and shields in place at  
all times.  
fig 7  
5
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REMOVAL FROM TRACTOR  
1.  
Reverse the procedure for attaching; see  
INSTALLATION, paragraphs 1 through 3.  
ADJUSTM ENTS  
1.  
2.  
SWIVEL ACTION: The swivel action is regulated  
9.  
DISENGAGE POWER to attachment and stop  
engine prior to making any adjustment or clearing  
the unit.  
by the nut and bolt on the swivel casting, fig 5.  
Loosening allows more action, tightening reduces  
the action. The swivel action should allow the  
mower to follow ground contour.  
10. DO NOT WEAR LOOSE fitting clothing.  
CASTERS: The caster wheels should be  
adjusted (if necessary) after the mower is  
attached to a tractor. Raise or lower the casters,  
by use of the spacers, to make the mower level  
with the ground, fig 6 , Item 46.  
11. KEEP HANDS, feet, hair, clothing, etc., away  
from moving parts.  
12. KEEP BYSTANDERS and pets removed from the  
work area.  
13. EXERCISE CAUTION to avoid slipping or falling,  
especially when operating in reverse with two  
wheel tractors.  
14. DIRECT DISCHARGE so as not to endanger life  
or property; such as people, pets, structures,  
cars, etc.  
OPERATION  
1.  
Refer to the tractors Owners Manual for safety  
and operating instructions to engage and  
disengage the PTO (power take-off).  
Operate the engine at full speed. In thick, lush  
growth reduce ground speed (not engine speed)  
to allow the mower enough time to cut and  
discharge.  
2.  
fig 9  
3. BLADE REMOVAL: STOP the engine, Put the  
PTO in the OUT position. Put the operating levers  
in NEUTRAL. BE SURE the blades have stopped.  
Remove the mower from the tractor. Turn the  
mower upside down. Hold the rotor shaft with a  
3/8” socket drive and remove the nut with a  
15367E1 Gravely Wrench or equivalent fig 9. Do  
not use the top spindle nut to hold the spindle form  
spinning  
ROUTINE MAINTENANCE  
1.  
2.  
Perform the lubrications as described in  
LUBRICATION, paragraphs 1 through 4.  
Check each rotor shaft nut to insure tightness fig  
1 , Item 15. See ADJUSTMENTS, paragraph 6.  
4. BLADE SHARPENING: Sharpen the blades.  
Balance after sharpening.  
3.  
4.  
5.  
Check all nuts and bolts to insure tightness.  
Sharpen and balance the blades.  
5. CUTTING HEIGHT: Place the collars above and/or  
below the blade for adjustment, fig 1, Items 19, 20,  
21. Note that the collars are not the same  
thickness. Keep the same combination on both  
rotors.  
Clear the mower of cuttings and debris.  
6
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9.  
Safety clutch action is regulated by the  
6.  
7.  
BLADE INSTALLATION: Place the blade and  
collars on the shaft at the desired cutting height.  
Put the flat washer and nut on as in  
attachment clutch assembly, fig 5, Items 1, 3, 4,  
5, 6, 7 and 8. Loosen all 6 nuts, Items 8. Tighten  
the 6 bolts all the way into the threaded back  
plate, Items 1 & 7. Back off each bolt 1/2 turn.  
Lock the bolts in position with the nuts  
BELT REMOVAL: Remove the belt covers.  
Unhook one end of each spring; use a spring  
puller or clamp-lock pliers. Remove the drive.  
Remove the belts. See figs 2, 3, & 4. fig 1, Item  
14 and 15. Hold the rotor shaft with a 3/8" socket  
drive and torque the nut to 100 ft. lbs. Similar  
tightness can be reached with a Gravely  
STORAGE  
1.  
Perform all that applies from ROUTINE  
MAINTENANCE and LUBRICATION.  
11367E1 Wrench or any 16" length handle  
wrench when used by an average man, fig 9.  
2.  
Apply a light coat of oil to preserve finish and  
appearance.  
8.  
BELT INSTALLATION: See ASSEMBLY  
paragraphs 4, 6, 7, 8, and 9 .  
7
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