pronovost PGS-740 Programming manual

OPERATOR'S / PARTS
MANUAL
Snowblowers
Model
PGS-740 & PGS-800
No. C3302 11/2011

Copyright © Les Machineries Pronovost Inc., 2011
All rights reserved.
Printed in Canada.

- 3 -
TABLE OF CONTENTS
Section Item Page
1 Introduction ................................................................................................................ 5
2 Safety .......................................................................................................................... 6
General Safety .................................................................................................. 6
Safety in Operation ........................................................................................... 6
Safety with Maintenance .................................................................................. 7
Safety in Transport ........................................................................................... 7
Safety in Storage ............................................................................................... 7
3 Decals .......................................................................................................................... 8
Safety Decals .................................................................................................... 8
Maintenance Decals ........................................................................................ 12
4 Assembly .................................................................................................................... 13
General assembly ............................................................................................ 13
Hydraulic Chute Kit: Motor............................................................................ 14
5 Start-up ...................................................................................................................... 15
Basic Start-up Procedures ............................................................................... 15
6 Maintenance .............................................................................................................. 16
General maintenance .................................................................................................. 16
7 Storage ....................................................................................................................... 17
8 Trouble Shooting ...................................................................................................... 18
9 Specifications............................................................................................................. 20
10 Parts List ................................................................................................................... 21
Snowblower PGS-740 PGS-800 .................................................................... 21
Hydraulic chute rotation kit for motor ............................................................ 24
Semi-industrial Chute PSIG-5472 .................................................................. 26
P.T.O. Shaft T60 # 8202 ................................................................................. 27
Gear Box # 8251 ............................................................................................. 28
Cylinder 25TR04 ............................................................................................ 29
Hydraulic Motor MLH-250 ............................................................................ 30
11 Torque Chart ............................................................................................................ 31
12 Warranty ................................................................................................................... 32

- 5 -
Figure 1
MODEL: 
SERIAL NO: 
DATE OF PURCHASE: 
INTRODUCTION 1
NOW take a moment to enter the model, serial
number and the date of purchase of your Snowblower
in the space provided.
When ordering parts from your Dealer, please refer to
these numbers for a fast and efficient service. Use
PRONOVOST parts for replacement.
The model and serial numbers are on the name plate
shown on Fig. 1.
Thank you for choosing PRONOVOST. We are
confident this equipment will meet your requirements
in terms of quality, performance and reliability.
This manual was prepared to assist you in the safe
operation of your new Snowblower. It contains
important information which will help you achieve
excellent returns with your Snowblower for years to
come.
Please read this manual completely before operating
your Snowblower and keep it for future reference.
Before starting the machine, you or any other person
who will be operating the Snowblower must
familiarize yourself with the safety recommendations
and the operating instructions. Please read carefully
and be sure to understand and follow all
recommendations and procedures.
In this manual, the right and left sides are identified as
shown on Figure 1.
If you require additional information on your
Snowblower, please contact your PRONOVOST
Dealer.
CONGRATULATIONS!
Right
Left

- 6 -
WHEN YOU SEE THIS SYMBOL
SAFETY
2
ATTENTION!
BE ALERT
YOUR SAFETY IS INVOLVED
This symbol «SAFETY ALERT» is used in this manual and
on the safety decals on the Snowblower. It warns you of the
possibility of danger. Carefully read, understand and follow
all safety recommendations before operating the
Snowblower.
1) Careful operation is the best assurance against acci-
dents. Carefully read this manual and follow all
recommendations before operating your Snowblower.
It is the owner’s responsibility to make sure that anyone
who will operate the Snowblower will read this manual
before operating the equipment.
2) Familiarize yourself with all controls and always be
ready to stop the Snowblower quickly in case of
emergency.
3) Never let a child operate the Snowblower.
4) Do not modify the Snowblower. Any non authorized
modification may affect the efficiency and/or safety of
the equipment and will automatically void the warranty.
5) Never operate the Snowblower with defective parts or if
damaged in any way. Have it repaired before operating.
6) Make sure all fasteners are in place and properly
secured or tightened. Refer to torque chart on page 31.
7) Avoid wearing loose fitting clothing when working with
the Snowblower. These could get entangled in moving
parts of the equipment and cause accidents.
GENERAL SAFETY
8) Prolonged exposure to noise may hamper hearing.
Protect yourself by wearing adequate protection
devices.
9) Hydraulic fluids under pressure can damage your skin.
Do not use your hands to locate a leak.
10) Before the beginning of the snow season, inspect all
areas where the Snowblower will be used and remove
any object which may cause an accident and/or damage
the equipment.
11) Never operate your Snowblower in poor visibility or
without proper lighting conditions.
SAFETY IN OPERATION
1) Be sure there are no obstructions around the equipment
and that no one stands near the equipment when in
operation.
2) Do not operate an engine in a confined or non ventilated
area.
3) Do not perform any adjustments, cleaning, maintenance
or repairs with the engine running. The engine must be
stopped and the P.T.O. disengaged. Preferably remove
the key from the ignition.
4) Wear adequate clothing when working in cold or windy
conditions.
5) Adjust skid shoes for proper ground clearance of
scraper blade, especially in rough terrain or soft ground
conditions.
6) Before operating, make sure the P.T.O. is properly
installed and secured.
7) Before starting-up the Snowblower, make sure the auger
and drum areas are free of ice.
8) Put P.T.O. control in neutral position before starting
engine.
9) Keep hands, feet and clothing away from moving parts
of the Snowblower. Stay away from the discharge chute.

- 7 -
SAFETY (cont'd)
2
10) Before unplugging the chute, always disengage the
P.T.O., stop the engine and relieve all hydraulic pres-
sure.
11) Do not operate in excessive inclined conditions. Be
careful when turning on slopes.
12) Never operate your Snowblower with missing guards or
without protective devices in place.
13) Do not operate your Snowblower near buildings,
windows or other vehicules without prior and proper
adjustment of the chute deflector.
14) Never aim discharge chute towards people or animals.
This may cause serious injuries.
15) Always reduce operating speed in slippery conditions.
16) Be careful when backing-up, make sure you have good
visibility.
17) Always be on the lookout for objects which may enter
the snowblower.
18) If undue vibrations are felt, disengage the P.T.O., stop
the motor and look for the cause of the vibration.
Vibration is usually the indication of a problem.
19) At the end of the operation, disengage the P.T.O., lower
the Snowblower, put transmission in neutral, apply
parking brake, stop engine and remove the key from the
ignition.
SAFETY WITH MAINTENANCE
1) Perform the Snowblower maintenance according to
recommendations contained in this manual.
2) Stop engine and relieve all hydraulic pressures before
doing inspection, maintenance or repairs.
3) Never perform any work under the Snowblower while it
is supported only by the tractor's hydraulic system. It
must be completely supported on blocks with sufficient
capacity.
SAFETY IN TRANSPORT
1) On public roads, use proper safety lights and check
local regulations.
2) Be alert while driving on the road. Never carry
passengers.
3) Always disengage P.T.O. while moving from one area
of work to another.
4) It is recommended to use both brake pedals
simultaneously for better control.
5) The recommended road speed should be such as to
maintain full control over steering and braking.
6) Be careful while backing up, make sure you have good
visibility.
SAFETY IN STORAGE
1) Provide adequate supports to prevent any accidental
overturning of the Snowblower.
2) Do not let children play in the area where the
Snowblower is stored.

- 8 -
DECALS
SAFETY DECALS
The safety decals are affixed wherever special safety
precautions are indicated. Locate them on the machine
and read them carefully. If a decal is damaged, lost or
illegible, install a new one. The following photos
indicate where each one must be installed.
3
Figure 2
Decal A Part no.: 190-11671
Figure 4
Decal B Part no.: 190-07722
Figure 3
Figure 5
A
B
B

- 9 -
DECALS (cont'd)
3
Decal E in Fig. 8 is located directly on the P.T.O.
shaft. It is not visible when the safety shield is in
place. It must never be visible when you operate the
equipment.
Figure 8
Decal E Part no.: A108
Figure 7
Decal C Part no.: 190-11641
Figure 6
C

- 10 -
DECALS (cont'd)
3
Figure 9
Decal F Part no.: A 109
Figure 10
Figure 14
Figure 13
Decal G Part no.: 190-10991
Figure 11
Decal D Part no.: A103
Figure 12
F
D
G

- 11 -
Figure 15
Decal H Part no.: 190-06651
DECALS (cont'd)
3
Figure 17
Decal J Part no.: 190-07611
Figure 16
Figure 18
J
H

- 12 -
DECALS (cont'd)
3
MAINTENANCE DECALS
The maintenance decals indicate the points requiring
lubrication. Refer to maintenance section for more
details.
Figure 20
Decal L Part no.: 190-11581
Figure 19
A 105 A 106
Figure 22
Figure 21
L
L

- 13 -
ASSEMBLY
ASSEMBLY
1) The Snowblower is shipped partly assembled.
2) Install 3-point system according to the model of
your Snowblower. (See section 10 for part
numbers). Use the holes most convenient to the
type of tractor used (Fig. 23).
3) Install P.T.O. shaft with the shear pin end onto the
Snowblower gear box. Then attach both safety
shield support chains to tractor and snowblower
(Fig. 24). WARNING: The telescoping tubes of
the drive shaft must never be allowed to bottom
out while maintaining a minimum overlap of 6
inches.
4) For the installation of the chute rotation
mechanism, please refer to page 14.
4
Figure 23
Figure 24

- 14 -
ASSEMBLY (cont'd)
HYDRAULIC CHUTE ROTATION Motor
1) Install U-shaped UHMW piece , place chute on
Snowblower and secure with retaining bracket and
bolts provided.
2) Install the mounting plate; put the required spacers
between mounting plate and base of chute (see p. 24
& 25). Do not tighten the bolts immediately, they
will be tightened at final adjustment (Fig. 25).
3) Install motor and 9 tooth gear. The thickness of the 9
tooth gear is slightly more than the ring-gear. Make
sure it exceeds on both sides of the ring gear (Fig.
26).
4) Using the take-up screws, adjust gear to mesh
without bottoming. Tighten mounting plate bolts.
5) Install guard. It is important that the cushion valve
furnished with your chute rotation kit be installed.
Cushion valve has been pre set in plant at 1200 psi.
(Fig. 27).
Figure 326
Figure 25
4
Figure 27

- 15 -
STARTING-UP
START-UP PROCEDURES
1) Check oil level in gearbox and in speed reducer if
so equipped. Use SAE 80W90 gear box oil.
2) Check oil level in auger drive chain box. Fill to
level plug. Use SAE 80W90 oil (Fig. 28).
3) Lubricate all points with a good quality
multipurpose grease. For the PTO tubes, use a
grade 0 synthetic grease like "Petro-Canada Arctic
Synthetic NLGI Grade 0" or equivalent.
4) Check chain take-up adjustment. The spring
maintaining the tension must be compressed to a
length between 3" and 3 1/4".
5) Verify for adequate tightness of all fastening
devices. Refer to torque chart on page 31.
6) Adjust skid shoes according to ground conditions
(Fig. 29).
7) Make sure of a 540 RPM input to your
snowblower.
8) Check impeller adjustment. The tip of the blades
should be approximately 1/8" to 3/16" from the
discharge wall of the drum. If necessary, adjust
with the take-up screws provided (Fig. 30).
5
Figure 29
Figure 30
Figure 28
Oil level 

- 16 -
MAINTENANCE
1) Wipe off all grease fittings with a clean cloth
before adding grease in order to avoid injecting
dirt and sand.
2) Repair or replace damaged grease fittings.
3) Lubricate all grease fittings every 8 hours of
operation.
4) Lubricate P.T.O. shaft as indicated below:
Pull out the P.T.O. And lubricate between the two
tubes with low temperature grease. Use a grade 0
synthetic grease like "Petro-Canada Arctic
Synthetic NLGI Grade 0" or equivalent.Drive line
tubes must slide easily even in cold weather. Clean
off old hardened grease and apply fresh grease as
needed.
5) Check oil level in gear box once a month. Adjust
to required oil level as per drawing in "Parts List
section". Use SAE 80W90 oil.
6) Check oil level in auger drive chain box once a
month. Fill to level plug, figure 28 page 15. Use
SAE 80W90 oil.
7) Check tension of drive chain every 24 hours of
operation and adjust if necessary.
8) Check for tightness of bearing collars every 48
hours of operation.
9) Change gearbox oil once a year. Adjust to
required oil level as per drawing in "Parts List
section". Use SAE 80W90 oil.
10) Change the auger drive chain box oil once a
year. Fill to level plug, figure 28 page 15. Use
SAE 80W90 oil.
11) Check all nuts and bolts once a year. If necessary
use torque chart on page 31.
12) For the auger drive shaft, always use a grade 5
shear bolt.
13) For the PTO shaft:
AT 540 RPM on a PTO size 60, the shear bolt is
10 mm, grade 8.8, part number 8218.
14) Anti-friction slides do not require lubrification
except at the end of the season in order to prevent
corrosion of steel components that are in contact
with the anti-friction material.
6
GENERAL MAINTENANCE

- 17 -
STORAGE
1) Store the Snowblower in a cool, dry place.
2) Support the Snowblower with wooden blocks.
3) Keep all piston rods in the retracted position. This
will assure better protection against the elements.
4) Clean your Snowblower.
5) Thoroughly inspect all parts of the Snowblower.
Replace or repair worn or defective parts.
6) Touch-up or repaint if necessary.
7) Lubricate all points before storage.
7

- 18 -
TROUBLESHOOTING
- Follow lubrication
recommendations.
- Replace defective U-joints.
- Make sure the Snowblower inlet
face is perpendicular to the
ground and if possible readjust
3-point hitch in order to position
the Snowblower further away
from tractor.
- Use high quality lubricant.
- Avoid raising Snowblower while
in operation.
- Readjust 3-point hitch in order
to position the Snowblower
closer to the tractor.
- Follow lubrication
recommendations.
- Replace defective telescopic
members.
- Clean and grease.
- Readjust 3-point hitch in order to
position the Snowblower further
away from tractor or shorten tu-
bes.
- Follow lubrication instructions.
- Adjust chain to prevent
interference between guard &
equipment.
- Replace worn or damaged
bearing rings.
- Eliminate any interference
between tubes and equipment or
tractor.
- Replace damaged tubes.
P.T.O. SHAFT
POSSIBLE CAUSEPROBLEM CORRECTION
- Insufficient lubrication.
- Excessive working angle.
- Poor quality lubricant.
- Too much sliding under load.
- Tube overlap too-short: minimum
recommended is 6".
- Insufficient lubrication.
- Contaminants (sand, etc.).
- Pin or orifice contaminated by
sand, ice, etc.
- Telescoping members too long,
exerting pressure on locking
device.
- Lack of lubrication.
- Wrong installation of guard
chain.
- Part of the guard in contact with
the equipment.
- Tubes in contact with the
equipment.
- Premature wear of U-joints and/
or bluish color of cross journals.
- Gripping or premature wear of
telescoping members.
- Damaged or jammed locking pin
or bolt.
- Premature wear of guard tube
bearing ring.
- Cut or deformed safety guard
tubes.
8

- 19 -
TROUBLESHOOTING (cont'd)
- Raise P.T.O. speed to a minimum
of 540 RPM.
- Adjust impeller blades closer to
drum outlet (1/8" to 3/16").
- Reduce travel speed.
- Raise P.T.O. speed to a minimum
of 540 RPM.
- Make sure the Snowblower is
completely empty before
reducing RPM, especially on
tractors with foot controlled
RPM.
- Repare clutch.
- Reduce travel speed.
- Remove the chute access panel.
- Replace shear bolt.
- Replace shear bolt.
- Replace shear bolt.
- Fix or replace chain.
- Replace the key.
- Remove ice.
- Check hydraulic connections.
- Replace the key.
- Tractor RPM too low.
- Gap too wide between impeller
blade tip and drum outlet wall.
- Insuffucient tractor HP.
- Tractor RPM too low.
- Tractor RPM reduced too early
with snow still in the
Snowblower.
- Slippage of PTO clutch
mechanism.
- Wet snow condition.
- Shear bolt broken on drive shaft.
- Shear bolt broken on drive shaft.
- Shear bolt broken on auger drive
shaft.
- Broken drive chain.
- Broken key on motor.
- Ice accumulation.
- Wrong hydraulic connections.
- Broken key on motor.
- The snow is not being thrown as
far as usual.
- Frequent plugging of discharge
chute.
- The impeller will not turn.
- The auger will not turn.
- The chute will not turn.
SNOWBLOWER
POSSIBLE CAUSEPROBLEM CORRECTION
8

- 20 -
SPECIFICATIONS
9
9
Model PGS-740 PGS-800
Horse power required 35 to 65 HP
Approximate performance 500 tons imp./hour (tractor 60 HP)
Height - chute base 35"
Chute rotation On anti-friction ring, for hydraulic motor
Frame height 36 3/4"
Lateral cutting height 58 1/2"
Working width 74" 80"
Drum diameter 28"
Depth of drum 10 1/2"
Drum position Centered
Drum liner 3/16" carbon steel 450
Impeller blades 4 blades x 3/8" thickness - welded
Size and height of impeller shaft Diameter 1.575" (40 mm) - Height 18"
Impeller speed 540 RPM (CW)
Standard P.T.O. shaft T60
Auger Dual band, toothed, welded, 28" diameter
Drive chain RENOLD No. 80HV in oil bath
Shear bolt 1 for the impeller + 1 for the auger drive
Scraper Carbon steel Standard
blade Stainless steel Optional
Skid Carbon steel (quick adjust) Standard (2 patins)
shoes Stainless steel (quick adjust) Optional (2 patins)
Rocktec (quick adjust) Optional (2 patins)
Bearing / ductile iron casing Standard
3-point hitch Category 2
Center of gravity from 3-pt hitch at its shortest 30 1/2"
Rotational force (reference) 42 468 lbs-po 44 580 lbs-po
Weight* 1 475 lbs 1 526 lbs
Design and specifications subject to change without notice.
* Weight including chute, cylinder for chute deflector and hydraulic motor for chute rotation.