Stanley PR41 User manual

© 2014 Stanley Black & Decker, Inc.
New Britain, CT 06053
U.S.A.
32472 8/2014 Ver. 5
USER MANUAL
Safety, Operation and Maintenance
PR41
HYDRAULIC
PRUNER

PR41 User Manual ◄ 3
SERVICING: This manual contains safety, operation, and routine maintenance instructions. Stanley Hydraulic Tools
recommends that servicing of hydraulic tools, other than routine maintenance, must be performed by an authorized
and certied dealer. Please read the following warning.
For the nearest authorized and certied dealer, call Stanley Hydraulic Tools at the number listed on the back of this
manual and ask for a Customer Service Representative.
WARNING
SERIOUS INJURY OR DEATH COULD RESULT FROM THE IMPROPER REPAIR OR
SERVICE OF THIS TOOL.
REPAIRS AND / OR SERVICE TO THIS TOOL MUST ONLY BE DONE BY AN
AUTHORIZED AND CERTIFIED DEALER.
IMPORTANT
To ll out a Product Warranty Recording form, and for information on your warranty,
visit Stanleyhydraulics.com and select the Company tab, Warranty.
(NOTE: The warranty recording form must be submitted to validate the warranty).
SAFETY SYMBOLS ..................................................................................................................................................4
SAFETY PRECAUTIONS..........................................................................................................................................5
ELECTRICAL HAZARDS ..........................................................................................................................................6
TOOL STICKERS & TAGS ........................................................................................................................................8
HOSE TYPES............................................................................................................................................................9
HOSE RECOMMENDATIONS ................................................................................................................................10
FIGURE 1. TYPICAL HOSE CONNECTIONS .....................................................................................................10
HTMA REQUIREMENTS......................................................................................................................................... 11
OPERATION............................................................................................................................................................12
FIGURE 2. EXAMPLE OF LATERAL BRANCH CUT...........................................................................................13
FIGURE 3. EXAMPLE OF FINAL CUT ................................................................................................................ 13
TOOL PROTECTION & CARE ................................................................................................................................14
TROUBLESHOOTING ............................................................................................................................................15
SPECIFICATIONS...................................................................................................................................................16
ACCESSORIES.......................................................................................................................................................16
PR41 PARTS ILLUSTRATION ................................................................................................................................17
PR41 PARTS LIST ..................................................................................................................................................18
TABLE OF CONTENTS

4 ► PR41 User Manual
Always observe safety symbols. They are included for your safety and for the protection of the tool.
LOCAL SAFETY REGULATIONS
Enter any local safety regulations here. Keep these instructions in an area accessible to the operator and mainte-
nance personnel.
Safety symbols and signal words, as shown below, are used to emphasize all operator, maintenance and repair ac-
tions which, if not strictly followed, could result in a life-threatening situation, bodily injury or damage to equipment.
This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible
injury or death.
DANGER
This safety alert and signal word indicate an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
WARNING
This safety alert and signal word indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
CAUTION
This safety alert and signal word indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
CAUTION
This signal word indicates a potentially hazardous situation which, if not avoid-
ed, may result in property damage.
NOTICE
This signal word indicates a situation which, if not avoided, will result in damage
to the equipment.
IMPORTANT
This signal word indicates a situation which, if not avoided, may result in dam-
age to the equipment.
SAFETY SYMBOLS

PR41 User Manual ◄ 5
Tool operators and maintenance personnel must always
comply with the safety precautions given in this manual
and on the stickers and tags attached to the tool and
hose.
These safety precautions are given for your safety. Re-
view them carefully before operating the tool and before
performing general maintenance or repairs.
Supervising personnel should develop additional pre-
cautions relating to the specic work area and local
safety regulations. If so, place the added precautions in
the space provided in this manual.
The PR41 Hydraulic Pruner will provide safe and de-
pendable service if operated in accordance with the in-
structions given in this manual. Read and understand
this manual and any stickers and tags attached to the
pruner and hoses before operation. Failure to do so
could result in personal injury or equipment damage.
• Operator must start in a work area without bystand-
ers. The operator must be familiar with all prohibited
work areas such as excessive slopes and danger-
ous terrain conditions.
• Establish a training program for all operators to en-
sure safe operation.
• Do not operate the tool unless thoroughly trained or
under the supervision of an instructor.
• Always wear safety equipment such as goggles, ear
and head protection, and safety shoes at all times
when operating the tool.
• Do not inspect or clean the tool while the hydraulic
power source is connected. Accidental engagement
of the tool can cause serious injury.
• Always connect hoses to the tool hose couplers be-
fore energizing the hydraulic power source. Be sure
all hose connections are tight.
• Do not operate the tool at oil temperatures above
140 °F/60 °C. Operation at higher temperatures can
cause higher than normal temperatures at the tool
which can result in operator discomfort.
• Do not operate a damaged, improperly adjusted, or
incompletely assembled tool.
• Do not inspect, clean or replace the pruner blade
while the hydraulic power source is connected.
• Never wear loose clothing that can get entangled in
the working parts of the tool.
• Keep all parts of your body away from the pruner
blade.
• Do not overreach. Maintain proper footing and bal-
ance at all times.
• Keep the pruner blade off all surfaces when starting
the tool.
• If used near energized electric lines, maintain
working distances according to OSHA guidelines
for working near energized lines (ref. Section
1926.950). Failure to comply with this warning could
result in serious personal injury.
• To avoid personal injury or equipment damage, all
tool repair, maintenance and service must only be
performed by authorized and properly trained per-
sonnel.
• Never cock, jam or wedge the blade during opera-
tion.
• Eye injury, and cutting or severing of body parts is
possible if proper procedures are not followed.
• Ensure that the blade is correctly mounted before
use.
• If the tool is dropped with a blade installed, the blade
and associated parts should be examined thorough-
ly before use.
• Only use blades manufactured by Stanley Hydraulic
Tools. Stanley assumes no responsibility for failure
in equipment, accidental damage, or accidental inju-
ry as a result of the use of blades not manufactured
by Stanley Hydraulic Tools.
• Always ensure the blade is sharp. Do not try to use
the tool with a dull blade.
SAFETY PRECAUTIONS

6 ► PR41 User Manual
The following guidelines must be followed to prevent
accidental contact with overhead electrical conductors
and/or communication wires and cables. (ref. ANSI
Z133.1-2000)
WORKING IN PROXIMITY TO ELECTRICAL
HAZARDS
An inspection shall be made by a qualied arborist to
determine whether an electrical hazard exists before
climbing, or otherwise entering, or performing work in
or on a tree.
Only qualied line-clearance arborists or qualied line-
clearance arborist trainees shall be assigned to work
where an electrical hazard exists. Qualied line-clear-
ance arborist trainees shall be under the direct supervi-
sion of qualied line-clearance arborist.
A second qualied line-clearance arborists or line-clear-
ance arborist trainees shall be within vision or voice
communication during line-clearing operations aloft
when line-clearance arborists or line-clearance arborist
trainees must approach closer than 10 feet (3.05 me-
Table 1 – Minimum approach distances from energized conductors for qualied line-clearance arborists
and qualied line- clearance arborist trainees.
Nominal Voltage
(kV phase-to-phase)
Includes 1910.269
elevation factor,
sea level to 5000 ft1
Includes 1910.269
elevation factor,
5001 – 10,000 ft1
Includes 1910.269
elevation factor,
10,000 – 14,000 ft1
ft-in mft-in mft-in m
0.05 to 1.0 Avoid contact Avoid contact Avoid contact
1.1 to 15.0 2–04 0.71 2–08 0.81 2–10 0.86
15.1 to 36.0 2-09 0.84 3–02 0.97 3–05 1.04
36.1 to 46.0 3–00 0.92 3–05 1.04 3–09 1.14
46.1 to 72.5 3–09 1.14 4–03 1.30 4–07 1.40
72.6 to 121.0 4–06 1.37 5–02 1.58 5–07 1.70
138.0 to 145.0 5–02 1.58 5–11 1.80 6–05 1.96
161.0 to 169.0 6-00 1.83 6–10 2.08 7–05 2.26
230.0 to 242.0 7–11 2.41 9–00 2.75 9–09 2.97
345.0 to 362.0 13–02 4.02 15–00 4.58 16–03 4.96
500.0 to 550.0 19–00 5.80 21–09 6.63 23–06 7.17
765.0 to 800.0 27–04 8.34 31–03 9.53 33–10 10.32
1. Exceeds phase-to-ground; elevation factor per 29 CFR 1910.269.
ters) to any energized electrical conductor in excess of
750 volts (primary conductor) or when:
1. Branches or limbs being removed cannot rst be
cut (with a pole pruner/pole saw) to sufciently clear
electrical conductors, so as to avoid contact.
2. Roping is required to remove branches or limbs
from such electrical conductors. This does not ap-
ply to individuals working on behalf of, or employed
by, electrical system owners/operators engaged in
line-clearing operations incidental to their normal
occupation.
Qualied line-clearance arborists and line-clearance
arborist trainees shall maintain minimum approach dis-
tances from energized electrical conductors in accor-
dance with Table 1.
All other arborists shall maintain a minimum approach
distance from energized electrical conductors in accor-
dance with Table 2.
Branches hanging on an energized electrical conductor
shall be removed using non-conductive equipment.
ELECTRICAL HAZARDS

PR41 User Manual ◄ 7
Table 2 – Minimum approach distances to energized
conductors for persons other than qualied line-
clearance arborists and qualied line- clearance
arborist trainees.
Nominal Voltage
kV phase-to-phase1
Distance
ft-in m
0.0 – 1.0 10–00 3.05
1.1 – 15.0 10–00 3.05
15.1 – 36.0 10–00 3.05
36.1 – 50.0 10–00 3.05
50.1 – 72.5 10–09 3.28
72.6 – 121.0 12–04 3.76
138.0 – 145.0 13–02 4.00
161.0 – 169.0 14–00 4.24
230.0 – 242.0 16–05 4.97
345.0 – 362.0 20–05 6.17
500.0 – 550.0 26–08 8.05
785.0 – 800.0 35–00 10.55
1. Exceeds phase-to-ground.
The tie-in position should be above the work area and
located in such a way that a slip would swing the arborist
away from any energized electrical conductors or other
identied hazard.
While climbing, the arborist should climb on the side of
the tree that is away from energized electrical conduc-
tors as required in Tables 1 and 2.
Footwear, including lineman’s overshoes, having electri-
cal-resistant soles, shall not be considered as providing
any measure of safety from electrical hazards.
Rubber gloves, with or without leather or other protec-
tive covering, shall not be considered as providing any
measure of safety from electrical hazards.
Ladders, platforms and aerial devices, including insulat-
ed aerial devices, shall be subject to minimum approach
distances in Table 1 and 2.
Aerial devices and attached equipment (such as chip-
pers) contacting energized electrical conductors shall be
considered energized. Contact shall be avoided, except
where emergency rescue procedures are being carried
out. Emergency rescue should be performed in accor-
dance with 4.3.
STORM WORK AND EMERGENCY
CONDITIONS-LINE CLEARANCE
Line clearance shall not be performed during adverse
weather conditions such as thunderstorms, high winds
and snow and ice storms.
Qualied line-clearance arborists and qualied line-
clearance arborists trainees performing line clearance
in the aftermath of a storm or under similar conditions
shall be trained in the special hazards associated with
this type of work.
Line-clearance operations shall be suspended when
storm work or emergency conditions develop involving
energized electrical conductors. Electrical system own-
ers/operators shall be notied immediately.
ELECTRICAL HAZARDS

8 ► PR41 User Manual
SAFETY TAG P/N 15875 (Shown smaller then actual size)
DANGERDANGER
READ OPERATION MANUAL AND
SAFETY INSTRUCTIONS FOR THIS
TOOL BEFORE USING IT.
USE ONLY PARTS AND REPAIR
PROCEDURES APPROVED BY
STANLEY AND DESCRIBED IN THE
OPERATION MANUAL.
TAG TO BE REMOVED ONLY BY
TOOL OPERATOR.
SEE OTHER SIDE
1. FAILURE TO USE HYDRAULIC HOSE LABELED AND CER-
TIFIED AS NON-CONDUCTIVE WHEN USING HYDRAULIC
TOOLS ON OR NEAR ELECTRICAL LINES MAY RESULT IN
DEATH OR SERIOUS INJURY.
BEFORE USING HOSE LABELED AND CERTIFIED AS NON-
CONDUCTIVE ON OR NEAR ELECTRIC LINES BE SURE THE
HOSE IS MAINTAINED AS NON-CONDUCTIVE. THE HOSE
SHOULD BE REGULARLY TESTED FOR ELECTRIC CUR-
RENT LEAKAGE IN ACCORDANCE WITH YOUR SAFETY
DEPARTMENT INSTRUCTIONS.
2. A HYDRAULIC LEAK OR BURST MAY CAUSE OIL INJEC-
TION INTO THE BODY OR CAUSE OTHER SEVERE
PERSONAL INJURY.
A. DO NOT EXCEED SPECIFIED FLOW AND PRESSURE
FOR THIS TOOL. EXCESS FLOW OR PRESSURE MAY
CAUSE A LEAK OR BURST.
B. DO NOT EXCEED RATED WORKING PRESSURE OF
HYDRAULIC HOSE USED WITH THIS TOOL. EXCESS
PRESSURE MAY CAUSE A LEAK OR BURST.
C. CHECK TOOL HOSE COUPLERS AND CONNECTORS
DAILY FOR LEAKS. DO NOT FEEL FOR LEAKS WITH
YOUR HANDS. CONTACT WITH A LEAK MAY RESULT
IN SEVERE PERSONAL INJURY.
IMPORTANT
D. DO NOT LIFT OR CARRY TOOL BY THE HOSES. DO
NOT ABUSE HOSE. DO NOT USE KINKED, TORN OR
DAMAGED HOSE.
3. MAKE SURE HYDRAULIC HOSES ARE PROPERLY CON-
NECTED TO THE TOOL BEFORE PRESSURING SYSTEM.
SYSTEM PRESSURE HOSE MUST ALWAYS BE CON-
NECTED TO TOOL “IN” PORT. SYSTEM RETURN HOSE
MUST ALWAYS BE CONNECTED TO TOOL “OUT” PORT.
REVERSING CONNECTIONS MAY CAUSE REVERSE
TOOL OPERATION WHICH CAN RESULT IN SEVERE
PERSONAL INJURY.
4. DO NOT CONNECT OPEN-CENTER TOOLS TO CLOSED-
CENTER HYDRAULIC SYSTEMS. THIS MAY RESULT IN
LOSS OF OTHER HYDRAULIC FUNCTIONS POWERED BY
THE SAME SYSTEM AND/OR SEVERE PERSONAL INJURY.
5. BYSTANDERS MAY BE INJURED IN YOUR WORK AREA.
KEEP BYSTANDERS CLEAR OF YOUR WORK AREA.
6. WEAR HEARING, EYE, FOOT, HAND AND HEAD PRO-
TECTION.
7. TO AVOID PERSONAL INJURY OR EQUIPMENT DAMAGE,
ALL TOOL REPAIR MAINTENANCE AND SERVICE MUST
ONLY BE PERFORMED BY AUTHORIZED AND PROPERLY
TRAINED PERSONNEL.
IMPORTANT
READ OPERATION MANUAL AND
SAFETY INSTRUCTIONS FOR THIS
TOOL BEFORE USING IT.
USE ONLY PARTS AND REPAIR
PROCEDURES APPROVED BY
STANLEY AND DESCRIBED IN THE
OPERATION MANUAL.
TAG TO BE REMOVED ONLY BY
TOOL OPERATOR.
SEE OTHER SIDE
The safety tag (P/N 15875) at right is
attached to the tool when shipped from
the factory. Read and understand the
safety instructions listed on this tag before
removal. We suggest you retain this tag and
attach it to the tool when not in use.
NOTE:
THE INFORMATION LISTED
ON THE STICKERS SHOWN,
MUST BE LEGIBLE AT ALL
TIMES.
REPLACE DECALS IF
THEY BECOME WORN OR
DAMAGED. REPLACEMENTS
ARE AVAILABLE FROM
YOUR LOCAL STANLEY
DISTRIBUTOR.
28502
PR41 Name Tag
03783
GPM Sticker 3–9 2000 PSI
25910
Notice Sticker
Failure to use hydraulic hose labeled and certified
as non-conductive when using hydraulic toolson
or near electric lines mayresultin deathor
Forproper and safe operationread ownersmanual
and mwke sure that you have been properly
trained in correct procedures requiredfor work
serious injury.
on or around electric lines.
ELECTROCUTION
HAZARD
DANGER
12412
Warning Sticker—Electrical
CLOSED
CENTER
FOR USE ON
CLOSED-CENTER
HYDRAULIC SYSTEM
03693
Closed Center Decal
TOOL STICKERS & TAGS

PR41 User Manual ◄ 9
The rated working pressure of the hydraulic hose must be equal to or higher than the relief valve setting on the hy-
draulic system. There are three types of hydraulic hose that meet this requirement and are authorized for use with
Stanley Hydraulic Tools. They are:
Certied non-conductive — constructed of thermoplastic or synthetic rubber inner tube, synthetic ber braid
reinforcement, and weather resistant thermoplastic or synthetic rubber cover. Hose labeled certied non-
conductive is the only hose authorized for use near electrical conductors.
Wire-braided (conductive) — constructed of synthetic rubber inner tube, single or double wire braid reinforce-
ment, and weather resistant synthetic rubber cover. This hose is conductive and must never be used near
electrical conductors.
Fabric-braided (not certied or labeled non-conductive) — constructed of thermoplastic or synthetic rubber in-
ner tube, synthetic ber braid reinforcement, and weather resistant thermoplastic or synthetic rubber cover. This
hose is not certied non-conductive and must never be used near electrical conductors.
HOSE SAFETY TAGS
To help ensure your safety, the following DANGER tags are attached to all hose purchased from Stanley Hydraulic
Tools. DO NOT REMOVE THESE TAGS.
If the information on a tag is illegible because of wear or damage, replace the tag immediately. A new tag may be
obtained from your Stanley Distributor.
THE TAG SHOWN BELOW IS ATTACHED TO “CERTIFIED NON-CONDUCTIVE” HOSE
THE TAG SHOWN BELOW IS ATTACHED TO “CONDUCTIVE” HOSE.
(Shown smaller than actual size)
SIDE 1
DANGER
1. FAILURE TO USE HYDRAULIC HOSE LABELED AND CERTIFIED AS NON-CONDUCTIVE
WHEN USING HYDRAULIC TOOLS ON OR NEAR ELECTRIC LINES MAY RESULT IN
DEATH OR SERIOUS INJURY.
FOR PROPER AND SAFE OPERATION MAKE SURE THAT YOU HAVE BEEN PROP-
ERLY TRAINED IN CORRECT PROCEDURES REQUIRED FOR WORK ON OR AROUND
ELECTRIC LINES.
2. BEFORE USING HYDRAULIC HOSE LABELED AND CERTIFIED AS NON-CONDUCTIVE
ON OR NEAR ELECTRIC LINES. WIPE THE ENTIRE LENGTH OF THE HOSE AND FIT-
TING WITH A CLEAN DRY ABSORBENT CLOTH TO REMOVE DIRT AND MOISTURE AND
TEST HOSE FOR MAXIMUM ALLOWABLE CURRENT LEAKAGE IN ACCORDANCE WITH
SAFETY DEPARTMENT INSTRUCTIONS.
SEE OTHER SIDE
SIDE 2
DO NOT REMOVE THIS TAG
3. DO NOT EXCEED HOSE WORKING PRESSURE OR ABUSE HOSE. IMPROPER USE
OR HANDLING OF HOSE COULD RESULT IN BURST OR OTHER HOSE FAILURE.
KEEP HOSE AS FAR AWAY AS POSSIBLE FROM BODY AND DO NOT PERMIT DIRECT
CONTACT DURING USE. CONTACT AT THE BURST CAN CAUSE BODILY INJECTION
AND SEVERE PERSONAL INJURY.
4. HANDLE AND ROUTE HOSE CAREFULLY TO AVOID KINKING, ABRASION, CUTTING, OR
CONTACT WITH HIGH TEMPERATURE SURFACES. DO NOT USE IF KINKED. DO NOT
USE HOSE TO PULL OR LIFT TOOLS, POWER UNITS, ETC.
5. CHECK ENTIRE HOSE FOR CUTS CRACKS LEAKS ABRASIONS, BULGES, OR DAM-
AGE TO COUPLINGS IF ANY OF THESE CONDITIONS EXIST, REPLACE THE HOSE
IMMEDIATELY. NEVER USE TAPE OR ANY DEVICE TO ATTEMPT TO MEND THE HOSE.
6. AFTER EACH USE STORE IN A CLEAN DRY AREA.
SEE OTHER SIDE
DANGER
DO NOT REMOVE THIS TAG
DANGER
(Shown smaller than actual size)
SIDE 2
5. CHECK ENTIRE HOSE FOR CUTS CRACKS LEAKS ABRASIONS, BULGES, OR DAMAGE TO
COUPLINGS IF ANY OF THESE CONDITIONS EXIST, REPLACE THE HOSE IMMEDIATELY.
NEVER USE TAPE OR ANY DEVICE TO ATTEMPT TO MEND THE HOSE.
6. AFTER EACH USE STORE IN A CLEAN DRY AREA.
DANGER
DO NOT REMOVE THIS TAG
DANGER
SIDE 1
1. DO NOT USE THIS HYDRAULIC HOSE ON OR NEAR ELECTRIC LINES. THIS HOSE IS
NOT LABELED OR CERTIFIED AS NON-CONDUCTIVE. USING THIS HOSE ON OR NEAR
ELECTRICAL LINES MAY RESULT IN DEATH OR SERIOUS INJURY.
2. FOR PROPER AND SAFE OPERATION MAKE SURE THAT YOU HAVE BEEN PROPERLY
TRAINED IN CORRECT PROCEDURES REQUIRED FOR WORK ON OR AROUND ELEC-
TRIC LINES.
3. DO NOT EXCEED HOSE WORKING PRESSURE OR ABUSE HOSE. IMPROPER USE OR
HANDLING OF HOSE COULD RESULT IN BURST OR OTHER HOSE FAILURE. KEEP HOSE
AS FAR AWAY AS POSSIBLE FROM BODY AND DO NOT PERMIT DIRECT CONTACT
DURING USE. CONTACT AT THE BURST CAN CAUSE BODILY INJECTION AND SEVERE
PERSONAL INJURY.
4. HANDLE AND ROUTE HOSE CAREFULLY TO AVOID KINKING, CUTTING, OR CONTACT
WITH HIGH TEMPERATURE SURFACES. DO NOT USE IF KINKED. DO NOT USE HOSE TO
PULL OR LIFT TOOLS, POWER UNITS, ETC.
DO NOT REMOVE THIS TAG
DANGER
SEE OTHER SIDE SEE OTHER SIDE
HOSE TYPES

10 ► PR41 User Manual
Oil Flow Hose Lengths Inside Diameter USE
(Press/Return)
Min. Working Pressure
GPM LPM FEET METERS INCH MM PSI BAR
Certied Non-Conductive Hose - Fiber Braid - for Utility Bucket Trucks
4-9 15-34 up to 10 up to 3 3/8 10 Both 2250 155
Conductive Hose - Wire Braid or Fiber Braid -DO NOT USE NEAR ELECTRICAL CONDUCTORS
4-6 15-23 up to 25 up to 7.5 3/8 10 Both 2500 175 4-6 15-23 26-100 7.5-30 1/2 13 Both 2500 175
5-10.5 19-40 up to 50 up to 15 1/2 13 Both 2500 175 5-10.5 19-40 51-100 15-30 5/8 16 Both 2500 175 5-10.5 19-40 100-300 30-90 5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
10-13 38-49 up to 50 up to 15 5/8 16 Both 2500 175 10-13 38-49 51-100 15-30 5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
10-13 38-49 100-200 30-60 3/4 19 Pressure 2500 175
1 25.4 Return 2500 175
13-16 49-60 up to 25 up to 8
5/8 16 Pressure 2500 175 3/4 19 Return 2500 175
13-16 49-60 26-100 8-30
3/4 19 Pressure 2500 175
1 25.4 Return 2500 175
Figure 1. Typical Hose Connections
Tool to Hydraulic Circuit Hose Recommendations The chart to the right shows recommended minimum hose diameters for various hose lengths based on gallons per minute (gpm)/ liters per minute (lpm). These recommenda- tions are intended to keep return line pressure (back pressure) to a minimum acceptable lev- el to ensure maximum tool performance. This chart is intended to be used for hydraulic tool applications only based on Stanley Hy- draulic Tools tool operating requirements and should not be used for any other applications. All hydraulic hose must have at least a rated minimum working pressure equal to the maxi- mum hydraulic system relief valve setting. All hydraulic hose must meet or exceed specications as set forth by SAE J517.
PRESSURE
RETURN
<<< FLOW
FLOW >>>
HOSE RECOMMENDATIONS

PR41 User Manual ◄ 11
HTMA / EHTMA REQUIREMENTS
Flow Range
Nominal Operating Pressure
(at the power supply outlet)
System relief valve setting
(at the power supply outlet)
Maximum back pressure
(at tool end of the return hose)
Measured at a max. uid viscosity of:
(at min. operating temperature)
Temperature: Sufcient heat rejection
capacity to limit max. uid temperature to:
(at max. expected ambient temperature)
Min. cooling capacity at a temperature
difference of between ambient and uid
temps
NOTE:
Do not operate the tool at oil temperatures above 140° F (60° C). Operation at higher temperatures can cause operator
discomfort at the tool.
Filter
Min. full-ow ltration
Sized for ow of at least:
(For cold temp. startup and max.
dirt-holding capacity)
Hydraulic uid Petroleum based
(premium grade, anti-wear, non-conductive)
Viscosity (at min. and max. operating temps)
NOTE:
When choosing hydraulic uid, the expected oil temperature extremes that will be experienced in service determine the
most suitable temperature viscosity characteristics. Hydraulic uids with a viscosity index over 140 will meet the requirements
over a wide range of operating temperatures.
*SSU = Saybolt Seconds Universal
4-6 gpm 7-9 gpm 9-10.5 gpm 11-13 gpm
(15-23 lpm) (26-34 lpm) (34-40 lpm) (42-49 lpm)
1500 psi 1500 psi 1500 psi 1500 psi
(103 bar) (103 bar) (103 bar) (103 bar)
2100-2250 psi 2100-2250 psi 2200-2300 psi 2100-2250 psi
(145-155 bar) (145-155 bar) (152-159 bar) (145-155 bar)
250 psi 250 psi 250 psi 250 psi
(17 bar) (17 bar) (17 bar) (17 bar)
400 ssu* 400 ssu* 400 ssu* 400 ssu*
(82 centistokes) (82 centistokes) (82 centistokes) (82 centistokes)
140° F 140° F 140° F 140° F
(60° C) (60° C) (60° C) (60° C)
3 hp 5 hp 6 hp 7 hp
(2.24 kW) (3.73 kW) (5.22 kW) (4.47 kW)
40° F 40° F 40° F 40° F
(22° C) (22° C) (22° C) (22° C)
25 microns 25 microns 25 microns 25 microns
30 gpm 30 gpm 30 gpm 30 gpm
(114 lpm) (114 lpm) (114 lpm) (114 lpm)
100-400 ssu* 100-400 ssu* 100-400 ssu* 100-400 ssu*
(20-82 centistokes)
HTMA
HYDRAULIC SYSTEM REQUIREMENTS
NOTE: These are general hydraulic system requirements. See tool specication page for tool specic requirements
TOOL TYPE
HTMA / EHTMA REQUIREMENTS
TYPE I TYPE II TYPE III
TYPE RR
BCD
3.5-4.3 gpm 4.7-5.8 gpm 7.1-8.7 gpm 9.5-11.6 gpm 11.8-14.5 gpm
(13.5-16.5 lpm) (18-22 lpm) (27-33 lpm) (36-44 lpm) (45-55 lpm)
1870 psi 1500 psi 1500 psi 1500 psi 1500 psi
(129 bar) (103 bar) (103 bar) (103 bar) (103 bar)
EHTMA
HYDRAULIC SYSTEM
REQUIREMENTS
CLASSIFICATION
Flow Range
Nominal Operating Pressure
(at the power supply outlet)
System relief valve setting
(at the power supply outlet) 2495 psi 2000 psi 2000 psi 2000 psi 2000 psi
(172 bar) (138 bar) (138 bar) (138 bar) (138 bar)

12 ► PR41 User Manual
PREPARATION FOR INITIAL USE
Each unit as shipped has no special unpacking or as-
sembly requirements prior to usage. Inspection to as-
sure the unit was not damaged in shipping and does not
contain packing debris is all that is required. After instal-
lation of hoses and couplers a unit may be put to use.
CHECK HYDRAULIC POWER SOURCE
1. Using a calibrated owmeter and pressure gauge,
check that the hydraulic power source develops a
ow of 3–9 gpm/11–34 lpm at 1000–2000 psi/70–
140 bar.
2. Make certain the hydraulic power source is equipped
with a relief valve set to open at 2100–2250 psi/145–
155 bar minimum.
3. Check that the tool is designed for the hydraulic sys-
tem type open-center (OC) or closed-center (CC)
operation). See the Parts Illustration for location of
marks which identify the tool as an OC or CC tool.
CHECK TOOL
1. Make sure all tool accessories are correctly in-
stalled. Failure to install tool accessories properly
can result in damage to the tool or personal injury.
2. There should be no signs of leaks.
3. The tool should be clean, with all ttings and fasten-
ers tight.
4. The tool must be periodically inspected for electric
insulation quality to ensure that it has kept its origi-
nal factory quality per OSHA 100 kV/A requirement.
CHECK TRIGGER MECHANISM
1. Check that the trigger operates smoothly and is free
to travel between the ON and OFF positions.
CONNECT HOSES
1. Wipe all hose couplers with a clean lint-free cloth
before making connections.
2. Connect the hoses from the hydraulic power source
to the hose couplers on the tool. It is a good prac-
tice to connect the return hose rst and disconnect
it last to minimize or avoid trapped pressure within
the saw motor.
3. Observe ow indicators stamped on hose couplers
to be sure that oil will ow in the proper direction.
The female coupler is the inlet coupler.
NOTE:
The pressure increase in uncoupled hoses left in the
sun may result in making them difcult to connect.
When possible, connect the free ends of operating
hoses together.
OPERATING PROCEDURES
•
IMPORTANT
READ AND BECOME FAMILIAR WITH THE
SECTIONS IN THIS MANUAL ON SAFETY
PRECAUTIONS, TOOL STICKERS AND TAGS,
HYDRAULIC HOSE REQUIREMENTS, HYDRAULIC
REQUIREMENTS, AND PRE-OPERATION
PROCEDURES BEFORE USING THIS PRODUCT.
Observe all safety precautions.
• Do not operate a pruner unless you have been spe-
cically trained to do so.
• Keep all parts of the body away from the pruner
blade during operation of the tool.
• Carry the pruner with the unit de-energized and the
blade away from the body.
• Always connect the hoses to the tool hose couplers
before energizing the power source.
• Do not operate a pruner that is damaged, improp-
erly adjusted or is not completely and securely as-
sembled.
• Keep the tool clean and free of oil and contaminates.
• Do not hang the pruner on utility wires or cables.
• Do not leave the pruner hanging in a tree.
• Do not leave cut branches in a tree.
• Branches bent under tension are considered haz-
ardous.
• Do not allow binding of the pruner blade.
• Keep away from energized electric lines the mini-
mum distance per OSHA guidelines.
• Do not inspect, clean or repair the pruner with the
power source operating or with operating pressure
at the pruner. Accidental engagement of the toolcan
cause serious injury.
OPERATION

PR41 User Manual ◄ 13
LATERAL BRANCH
BRANCH TO BE CUT
BLADE TOWARDS
LATERAL BRANCH
WILL LEAVE EDGE
FLUSH WITH LATERAL
BRANCH
NO STUB LEFT
Figure 2. Example of Lateral Branch Cut
WARNING
The following are general wood cutting procedures
and techniques. Differences in the terrain,
vegetation, and type of wood will make this
information more or less valid for particular areas.
For advice on specic wood cutting problems or
techniques for your area, consult your local Stanley
representative or your county agent. They can often
provide information that will make your work safer
and more productive.
WARNING
Do not cut material that is directly overhead. When it
falls it may cause operator injury.
THIS FIRST CUT IS TO TAKE
WEIGHT OFF FOR FINAL CUT
TO PREVENT THIS LIMB FROM
SPLITTING DOWN THE CENTER
FINAL CUT
Figure 3. Example of Final Cut
OPERATION

14 ► PR41 User Manual
• Make sure all couplers are wiped clean before con-
nection.
• The hydraulic circuit control valve must be in the
OFF position when coupling or uncoupling hydraulic
tools. Failure to do so may result in damage to the
quick couples and cause overheating of the hydrau-
lic system.
• Always store the tool in a clean dry space, safe from
damage or pilferage.
• Make sure the circuit PRESSURE hose (with male
quick disconnect) is connected to the IN port. The
circuit RETURN hose (with female quick disconnect)
is connected to the opposite port. Do not reverse cir-
cuit ow. This can cause damage to internal seals.
• Always replace hoses, couplings and other parts
with replacement parts recommended by Stanley
Hydraulic Tools. Supply hoses must have a mini-
mum working pressure rating of 2500 psi/172 bar.
• Do not exceed the rated ow (see Specications) in
this manual for correct ow rate and model number.
Rapid failure of the internal seals may result.
• Always keep critical tool markings, such as warning
stickers and tags legible.
• Do not use the tool for applications it was not de-
signed for. The pruner is intended to cut wood only.
• Keep blade sharp for maximum tool performance.
• Tool repair should be performed by experienced
personnel only.
• Make certain that the recommended relief valves
are installed in the pressure side of the system.
• Do not use the tool for applications for which it was
not intended.
NOTICE
In addition to the Safety Precautions found in
this manual, observe the following for equipment
protection and care.
TOOL PROTECTION & CARE

PR41 User Manual ◄ 15
If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.
When diagnosing faults in operation of the tool, always make sure the hydraulic power source is supplying the cor-
rect hydraulic ow and pressure as listed in the table. Use a owmeter know to be accurate. Check the ow with the
hydraulic uid temperature at least 80 °F/27 °C.
PROBLEM CAUSE SOLUTION
Tool will not operate. Hydraulic system not engaged or
running.
Engage or start hydraulic system.
Hydraulic system control valve OFF. Turn the system control valve ON.
Tool not connected to the Hydraulic
system.
Connect tool to the system.
Trigger and valve spool stick. Damaged trigger guard. Have repaired by authorized dealer.
High back pressure. Determine cause of high back pressure
in return line and remove restriction.
Tool reverse plumbed to the system. Correctly connect the pressure and
return lines.
Valve spool or spool bore scored by
contaminated hydraulic uid.
Have repaired by authorized dealer.
Pruner cuts poorly. Blade is dull. Replace with sharp blade.
Pruner is running backwards. Check direction of blade cut. Correct
direction is for blade to cut when
squeezing the trigger. Blade should
be retracted when not squeezing the
trigger.
System relief valve set too low. Check system relief and adjust relief
valve to crack open at 2100 psi.
Piston seal leaks or piston or cylinder
is damaged.
Have inspected and repaired by
authorized dealer.
Hydraulic oil leaks between
valve handle and outer tube
handle.
Seals worn or piston rod worn. Have repaired by authorized dealer.
TROUBLESHOOTING

16 ► PR41 User Manual
Capacity......................................................................................................................................2-1/4 inch/5.7 cm cut
Pressure Range................................................................................................................ 1000–2000 psi/70–140 bar
Maximum Back Pressure...................................................................................................................... 250 psi/17 bar
Flow Range ................................................................................................................................. 3–9 gpm/11–34 lpm
Porting .......................................................................................................................... 3/8 NPT Female Pipe Thread
Connect Size and Type .................................................................. 3/8 in. NPT × 3/8 in. NPT Male Pipe Hex Nipple
Hose Whips ............................................................................................................................................................ No
Weight ...................................................................................................................................................11.5 lb/5.2 kg
Overall Length .................................................................................................................................. 84.25 in./214 cm
Maximum Fluid Temperature .................................................................................................................. 140 °F/60 °C
ACCESSORIES
DESCRIPTION PART NO.
Knife Blade ........................................................................................................................................................58649
Certied Non-Conductive Dual Oil Resistant Hose, 3/8 in. dia. ×10 ft with guards ..........................................05005
SPECIFICATIONS

PR41 User Manual ◄ 17
PR41 PARTS ILLUSTRATION

18 ► PR41 User Manual
ITEM
PART
NO. QTY DESCRIPTION
44 28502 1 NAME TAG
45 25910 1 NOTICE STICKER
46 51183 1 TRIGGER
47 05268 1 HEX SLOTTED NUT
03693 1 CLOSED CENTER DECAL
(PR41231 ONLY)
03972 1 FEMALE COUPLER
(SUPPLIED W/ PR4113103 ONLY)
03973 1 MALE COUPLER
(SUPPLIED W/ PR4113103 ONLY)
03971 1 COUPLER SET (PR411303 ONLY)
32473 1 SEAL KIT
NOTE:
Use Part Number and Part Name when ordering.
MODEL DESIGNATIONS
PR41131 Open Center (OC) only
PR41231 Closed Center (CC) only
PR413103 Open Center (OC) only
ITEM
PART
NO. QTY DESCRIPTION
1 28415 1 CYLINDER
2 28416 1 CYLINDER OIL TUBE
3 00252 2 O-RING
4 00175 2 O-RING
5 01809 1 SPOOL
6 01812 1 SPOOL SCREW
7 73650 1 VALVE HANDLE ASSY
8 03044 2 HEX NIPPLE
9 22147 2 CAPSCREW
10 51182 1 TRIGGER GUARD
11 01534 1 ROLL PIN
12 16556 1 SPRING
13 00560 1 O-RING
14 00018 1 O-RING
15 00535 1 PISTON (PR41131, PR4113101)
16 18885 1 PISTON (PR41231 ONLY)
17 00539 1 DISC VALVE
(PR41131, PR4113101 ONLY)
18 00552 1 DISC VALVE SPRING (PR41131,
PR4113101 ONLY)
19 00534 1 PISTON NUT (PR41131, PR4113101)
20 36133 1 INTERNAL TUBE ASSY
21 36128 1 PISTON ROD
22 00574 1 O-RING
23 01815 1 BACK-UP RING
24 01211 1 O-RING
25 08248 1 SLIDE LINK BOLT
26 28418 1 TUBE COUPLING
27 28432 1 LOCK NUT
28 36130 1 EXTERNAL TUBE ASSY
29 08249 1 CLEVIS PIN
30 00283 2 LOCK WASHER
31 00569 2 CAPSCREW
32 00757 1 ROLL PIN
33 36237 1 WASHER
34 27747 1 HOOK
35 58649 1 KNIFE
36 03029 2 COTTER PIN
37 36213 1 KNIFE BOLT
38 08246 1 SLIDE HEAD ASSY
39 28401 1 LINK BAR
40 08247 1 CLEVIS PIN
41 —1DIELECTRIC TEST STICKER
42 12412 1 WARNING STICKER
43 03783 1 GPM STICKER
PR41 PARTS LIST

Stanley Hydraulic Tools
3810 SE Naef Road
Milwaukie, Oregon 97267-5698 USA
[phone] / Fax [phone]
www.stanleyhydraulics.com