Caravaggi SP 20 Operating instructions

USER & MAINTENANCE MANUAL
- SPARES LIST -
Stump Grinder
SP 20-25
BEFORE USING THE MACHINE , READ THE
INSTRUCTION MANUAL

Table of Contents Page
Safety ………………………………………. 2
Operating Procedures
Before Starting…………………….. 3
Starting Engine……………………. 4
Grinding Stump Hints………….…. 5
Adjustments
Belt………………………………….. 6
Clutch………………………………. 7
Hydrostatic Drive………………….. 7
Differential…………………………. 7
Disk Brake Control………………... 8
Operator Stop Switch…………….. 9
Maintenance Check
Belts………………………………… 6
Clutch………………………………. 7
Engine………………………….…... 10
Hydrostatic Drive………………….. 8
Disk Brake Control………………... 8
Teeth Setting 11
Parts Diagram ………………………………………. 12
Parts Listing ………………………………………. 13 - 16
Wiring Diagram ………………………………………. 17

Read & understand this manual
Before Operating unit, understand all operating
instructions & safety information
Safety Instructions
1. Before using the machine, check that all bolts are tight & all
guards in place.
2. The STUMP GRINDER must not be operated in an enclosed
space.
3. Any maintenance/ cleaning work and removal of guards must
not be carried out until the engine has been switched off and
the flywheel has come to a complete standstill - it should be
noted that the flywheel will turn for sometime after the power has
been switched off.
4. On completion of repairs / maintenance work, all guards must
be fitted prior to putting the machine into operation.
5. When carrying out repairs care should be taken to fit only
genuine manufactures original parts or parts recommended by
the manufacturer.
6. The Operator should be responsible for keeping Third Parties at
a safe distance whilst the machine is in operation.
7. The machine should be operated only in accordance with
instruction manual conditions.
8. While the machine is in operation the operator must wear the
appropriate safety clothing and safety hat with ear defenders &
protective face visor.
9. Where fitted, a hand brake must be applied when parking.
10.All operators must be suitably trained in the operation of this
machine.
11.Shut off the engine immediately if the unit develops any unusual
vibrations or noise
12.Always remove key when not in operation
13.Contact with rotating teeth will CAUSE SERIOUS INJURY
14.Replace Worn Or Unreadable Safety Stickers
NO PERSONS UNDER THE AGE OF EIGHTEEN should be
ALLOWED TO OPERATE THIS MACHINE

Ensure you have read & understood the entire manual
before proceeding!!!
Check the following before starting
1. Engine oil
2. Belt tension
3. Cutter wheel bearings
4. All belts, bolts & teeth are tight, guards are in place
5. That safety gear is used by the operator
6. Fuel
7. Controls on instrument panel
NOTE:The 25hp version is very powerful, and therefore until
the operator becomes familiar with the use of the machine, you
may find that you will experience a higher than normal use of
hydstat belt.

Ensure you have read & understood the entire manual
before proceeding!!!
1. Adjust handle bar to a comfortable position and secure with
pin before starting the engine.
2. Ensure the brake is locked.
3. Push handle down so the cutter wheel is off the ground.
Starting Engine
1. Pull choke if engine is cold.
2. Be sure the on- off switch is in the "off" position.
3. Open throttle to 1/4 open - throttle has twist lock - turn left
and pull in or out, then twist to the right to lock.
4. Engage Operator stop switch handle.
5. Turn key to start the engine.
6. Push choke in, turning throttle slowly, to full open position.

Ensure you have read & understood the entire manual
before proceeding!!!
Grinding Stump
1. Place cutter wheel directly in front of the stump.
2. Using lever on handle, lock the one wheel brake- for tighter
brake adjustment, turn the knob on top of the brake lever.
3. Pull throttle full on & twist to lock.
4. Turn clutch switch to ON position.
5. Continue to grind to desired depth.
Hints
When grinding over 10" above or below ground, adjust handle
bar for better control & comfort.
On larger stumps, chips may begin to build up under wheels.
Release brake and pull machine towards you so that the chip
pile is directly under the cutting wheel.
Drop cutter wheel down on chip pile all material will discharge
from the machine area.
Be sure the brake is adjusted so that locked wheel will not
creep while grinding.
On larger stumps DO NOT ALLOW STUMP GRINDER WHEELS TO
DROP INTO HOLE-fill with chips or change position.
Just complete stump flush with ground, then go back and cut
to desired depth.
After grinding
Allow engine to cool
Wash off grinder
Inspect grinder
Load for transport

Before attempting any adjustment, be sure that the engine
is shut off. The key, spark plugs, battery cable are
removed. And the engine cool to touch!
Belt tension Adjustment
1. Remove belt guard
2. Loosen inner guard bolts (2) attached to engine
3. Loosen hydrostatic drive belt idler
4. Loosen (4) engine base bolts
5. With long socket extension drive, move engine forward with
rear adjusting bolt
6. When belt tension is proper (11 - 14 ft/lbs. tension)
retighten all loosened bolts
7. Reposition belt idler for hydrostatic drive
8. Reassemble belt guard
NOTE: NEW BELTS REQUIRE A BREAK-IN PERIOD OF APPROX 2HRS,
READJUSTMENT MAYBE NEEDED AT THIS TIME.
Belt layout

Ensure you have read & understood the entire manual
& follow all safety instructions before proceeding
Hydrostatic Belt Adjustment Adjustment is made by moving cam
bearing up or down. Caution: Over
tightening this belt will damage the
hydrostatic pulley.
Differential Adjustment This unit is enclosed & needs minimal
maintenance
Electric Clutch Engagement The electric clutch needs no adjustment
or lubrication
Caution
A. Never engage clutch
over 1600 rpm. Any clutch engagement
over 1600 rpm can & will damage the
clutch.
B. Make sure that there is
a minimum of 12 volts to the clutch at
all times. The torque on the clutch must
move freely at all times, from 1/8" up
and down, and from side to side. You
can inspect the torque arm through the
square hold located in the backside of
the belt guard.
Danger: never transport the stump
grinder with the cutter wheel rotating or
the clutch engaged.
Hydrostatic Drive - Neutral
Adjustment
The drive itself contains no adjustments.
The ground control lever, however, when
in automatic neutral position, should allow
any forward or reversing creeping of the
grinder (providing the grinder is on level
ground, on unlevel ground, see disk brake
control. Neutral position is adjusted by
removing the quick disconnect from the
control arm located on the bottom side of
the transmission. Turn the socket in one
complete turn in either forward of reverse
position to adjust transmission onto
neutral, more than one turn may be
needed sometimes.

Before attempting any adjustment, be sure that the engine
is shut off. The key, spark plugs, battery cable are
removed. And the engine cool to touch!
Teeth should be positioned in the pockets & tightened to
100 - 110 ft/lbs. torque
Teeth should be set using a tooth gauge so all teeth will be projecting the
same amount.
Teeth should be set as follows:
STR LH STR LH
RH STR RH STR
Caution: Never use the machine with missing teeth or badly worn teeth,
this will cause the cutter wheel to be out of balance & cause wear on
bearings & shaft.
The pockets are reversible, when turning, position them in the exact
location- this will ensure the cutter wheel remains in balance.
Teeth should be kept sharp.
Installation of Teeth
When installing teeth on the cutter wheel, be sure the teeth are all
extended to an equal length beyond the wheel. A tooth gauge is provided
for this.
Tooth Gauge
Tooth
Position of
all teeth
5/8
th
Cutter Wheel
After teeth are in
positioned, lock by
tightening the pocket
bolts

Ensure you have read & understood the entire manual
& follow all safety instructions before proceeding
Hydrostatic Drive Disengagement Adjustment
When the engine is not running, the grinder cannot be moved,
since the hydrostatic drive is in locked position On the
beltguard side, there is a handle push handle forward and
down, this will unlock the hydrostat unit and allow
freewheeling.
When the engine is running, there is power to the
transmission, Be careful to only move slowly, the control valve
to transport the machine in a forward or reverse direction. The
travel speed is determined by the rpm of the engine, and how
quickly the control valve is moved.
When using grinder on unlevel ground, the grinder may have a
tendency to creep down hills. The brake control located on the
control panel can be pulled so as to lock the disc brake on the
transmission.
Caution: Damage can occur to Brake if to much pressure is
applied.
Handbrake Adjustment
Adjustment ScrewAdjustment nyloc
Vite di
regolazio

Never attempt to alter, modify, or override this switch !!!
Spring
30303
Lock nut
36120
Operator presence
Handle Bar Bow
30300
Stump Grinder
Handle bar
Electric
Clutch
Switch
36086
Ignition
Switch
Micro-switch
26357
Wire
Harness
36211
Stop
Switch
26144
Hex Nut
36356
Hextension Nut
30302
Bolt
36115
PULL UP TO
ENGAGE

Before attempting any adjustment, be sure that the engine
is shut off. The key, spark plugs, battery cable are
removed. And the engine cool to touch!
Item Action Each use
Bearings, shaft Grease X
Bearings, wheel
Belt Tension
Bolts
Teeth
Safety switches
Safety stickers
Tyres, Flaps
Wires, Cables
Engine
Grease
Tension
Tightness
Tightness, sharpness
Operational
Readable
Condition
Condition
Refer to Manual
X
X
X
X
X
X
X
X
Engine
adjustment
Grease
p
oints

Parts Diagram - Models 20sp & 25sp

Parts List - Models 20sp & 25sp
Item No Quantity Part No. Description
1 1 30160SP Frame 20SP - 25SP
2 1 324080 Handle Bar
3 1 324081 Connector Bar
4 2 324116 Lock Collar
5 1 324138 Bent Pull Pin
6 1 324139 Spring
7 1 324140 Washer
8 1 36160 Clip
9 1 36189 Control Panel Sticker
10 1 36211 Wire Harness
12 1 36144 On Off Switch
13 5 36146 Cable Tie
14 1 36148 Brake Lever
15 1 36150 Outer Housing Brake
16 1 36149 Inner Brake Cable
18 1 30098 Chute Flap
19 1 30096 End Flap
20 2 316133 Idler Bearing
21 1 36144 Knob (on - off) Switch
22 1 36230 Throttle Cable
25 1 36227 Choke Cable
28 1 36426 For / Rev Control
29 1 36426 Control Cable
30 1 36122 Hex Nut
31 2 36130 Socket Set Screw
33 8 36182 Lock Nut
34 8 36181 Bolt
35 13 36158 Bolt
36 20 36120 Lock Nut
37 19 36126 Washer
38 2 36112 Bolt
39 1 30158 Cutter Box
40 1 30130 Cutter Wheel

Parts List - Models 20sp & 25sp
Item No Quantity Part No. Description
41 1 30185 Cutter Shaft
44 4 36172 Pockets CS
45 4 36171 Pockets TH
46 8 36132 Bearing Bolt
47 2 36135 Pillow Block Bearing
48 2 16174 Tooth, RH
49 2 16175 Tooth, LH
50 4 16173 Tooth, STR
51 3 36131 Wheel Stud
52 3 36125 Nyloc
53 4 36192 Bolt
54 4 36121 Nyloc
55 10 36127 Washer
56 2 36221 Safety Sticker
57 1 36284 Safety Sticker
58 1 36258 Fuel Filter
59 1 36310 Filler Cap
60 1 36270 Fuel Tank
61 1 36260 Tank Nipple
62 1 30053 Inner Belt Guard
63 1 30051 Outer Belt Guard
64 2 36157 Cutter Wheel Belts
65 1 36256 Fuel Hose
66 4 36257 Clamp, Hose
67 1 36238 Cam Bearing
68 1 36237 Cutter Wheel Pulley
69 1 36152 Bushing
70 3 30054 Spacer
72 1 36217 Sticker
73 1 36249 Sticker
74 2 36114 Bolt
75 1 36123 Bolt
77 1 36191 Nyloc
78 1 36117 Set Screw
80 1 36268 Cam Lever

Parts List - Models 20sp & 25sp
Item No Quantity Part No. Description
81 1 36239 Sheave- 3 -1/2" dia. 1- 7/16"
82 1 36307 Keyway
83 1 36235 Hydrastat Belt
84 1 36303 Spacer
84 1 36236 Shim
85 1 36250 Electric Clutch
86 1 36086 On -Off Switch
86A 1 36364 On - Off Sticker
87 1 36365 Wire Harness
93 1 36248 Peerless Diff
94 1 36241 Transmission Pump
95 2 36212 Battery Cable
97 1 36209 Bolt
98 8 36129 Washer
99 4 36193 Nyloc
100 1 36244 Gasket
101 1 36240 Sheave 3" dia. 5/8bore
102 1 36309 Bolt
103 1 36312 Keyway
104 1 36312 Nyloc
105 3 36200 Bolt
106 4 36115 Bolt
107 7 36190 Washer
108 1 36285 Oil Filter
110 2 36245 Tyre
111 2 36245-1 Wheel
111 2 36245-2 Hub
114 1 36305 Exhaust
119 1 36247 Kohler 25hp
120 1 36247 Kohler 20hp
121 1 36213 Battery - 071
122 2 36264 Ring Clip
123 2 36263 Woodruff Key
124 1 36246 Spacer , Wheel
125 1 36232 Cable, Locking Bracket
126 1 36267 Control Arm- Transmission
127 1 36234 Pivot- Hydrastat Cable

Parts List - Models 20sp & 25sp
Item No Quantity Part No. Description
129 4 36186 Bolt
130 4 36190 Washer
131 1 36272 Nyloc
132 2 36261 Brake Pad
133 2 36240 Dowel Pin
134 1 36341 Disk Brake
135 1 36342 Brake Pad Plate
136 1 36343 Brake Pad Holder
137 1 36344 Nyloc
138 2 36345 Bolt
139 1 36233 Lever, Cable Clamp
1 36242 Gear Spacer
1 36243 Tooth Gauge
1 36265 Ring Clip
145 1 36300 Operator Presence Bar
146 1 36301 Linkage
147 1 36302 Extension Nut
148 1 36356 Hex Nut
149 1 36357 Micro Switch
150 1 30303 Spring
151 1 36355 Sticker
152 1 36358 Operator Presence -Stop Switch Kit
154 1 36398 Battery Lid
156 1 36373 Heavy Duty Air Cleaner
157 1 36374 Air Cleaner Hood
158 1 36375 End Cap- Air Cleaner
159 1 36376 Pre Cleaner Cap
160 1 36377 Air Filter
161 1 16378 Inner Filter
162 1 36379 Bracket - Engine Mounting
163 1 36380 Bracket - Air Cleaner Mounting
164 1 36381 Carb Adaptor
165 1 36382 Hose Cab Adaptor
166 1 36383 Clamp- Hose & Pre Cleaner
181 1 36370 Engine Shaft Washer Cap
182 1 36371 Keyway
183 1 36372 Bolt

Wiring diagram
MICROSWITCH
ON/OFF SWITCH
(Beige knob)
NM CLD
COMMN
ELECTRIC
CLUTCH
SWITCH
Purple
White
Blue
Yellow
Red
Black
Black
Red
Yellow
Blue
White
Purple
To Engine
To clutch
Red
Black
Ground
KEY SWITCH
Earth
S
AM
R B

CARAVAGGI MACCHINE INDUSTRIALI
Via Monte Adamello , 20
25037 Pontoglio ( BS ) - ITALY
Tel. [phone] - Fax [phone]
Internet http://www.caravaggi.com
Email [email protected]
0205