Duff-Norton 228-R Manual

Model Numbers
228R
326R
528RX
528RX
536RX
126RX
144RX
Duff Norton Air Motor Jack Co.
2111 4
th
AN
2111
4
th
A
ve.
N
.
Billings, MT 59101
P: 406-252-4294
F: 406-252-4812
www.duffnortonjack.com

Table of Contents
Section I Introduction 1
1-1. General 1
1-2. Construction 1
1-3. Technical Specifications and Operational Characteristics 1
TABLE 1-1. Technical Characteristics 1
TABLE 1-2. Operating Specifications 2
Section II Inspection, Testing, and Maintenance 2
2-1. Inspection 2
2-2. Inspection Classification 2
2-3. Initial Inspection 2
2-4. Frequent Inspection 2
FIGURE 2-1. Inspector's Report 3
TABLE 2-1. Minimum Inspection Schedule 3
TABLE 2-2. Maximum Allowable Axial Play Between Nut and Lifting Screw 4
2-5. Periodic Inspection 4
2-6. Load Test 5
2-7. Maintenance 5
2-8. Lubrication 5
2-9. Cleaning 5
FIGURE 2-2. Throttle Adjustment for 228R and 326R Jacks 6
FIGURE 2-3. Throttle Adjustment for 528RX, 536RX, 126RX, and 144RX Jacks 6
Section III Operation 7
3-1. Operational Requirements 7
3-2. Operating Procedures and Precautions 7
Section IV Illustrated Parts List 7
41
General
7
4
-
1
.
G
enera
l
7
List of Illustrations 7
FIGURE 4-1. Exploded Illustration of 228R Jack 8
Parts Breakdown for 228R Jack 9-11
FIGURE 4-2. Exploded Illustration of 326R Jack 12
Parts Breakdown for 326R Jack 13-15
FIGURE 4-3. Exploded Illustration of 528RX and 536RX Jacks 16
Parts Breakdown for 528RX and 536RX Jacks 17-20
528/536RX to CMJ Conversion Kits 20
FIGURE 4-4. Exploded Illustration for 126RX and 144RX Jacks 21
Parts Breakdown for 126RX and 144RX Jacks 22-25
126/144RX to CMJ Conversion Kits 25
FIGURE 4-5. Exploded Illustration for X3972A Air Motor 26
Parts Breakdown for X3972A Air Motor 26-27
FIGURE 4-6. Exploded Breakdown for X4153 Air Motor 28
Parts Breakdown for X4153 Air Motor 29
Duff Norton Air Motor Jack Warranty Policy
Subject to the condition stated herein, Duff Norton Air Motor Jack Co. will repair or replace, without charge, any parts proved to our satisfaction to have been defective in material or
workmanship. Claims must be made within one year after the date of shipment.
The warranty is null and void for:
1. Units or any parts that become inoperative because of improper maintenance, eccentric loading, overloading, chemical or abrasive action, excessive heat, or other abuse.
2. Equipment which has been altered or modified by anyone without DNAMJ Co.'s authorization.
3. Equipment and accessories not of DNAMJ Co.'s manufacture are warranted only to the extent of the original manufacturer's warranty and subject to the same conditions as stated
above regarding improper maintenance, abuse, overloading, etc.
4. Except as stated herein, DNAMJ Co. makes no other warranties, expressed or implied, including warranties of merchantability and fitness for a particular purpose.

1
Section I
Introduction
1-1. General
a. This manual provides instructions for
operating, inspection, testing, and maintenance,
as well as an illustrated parts list for the
following Duff Norton Air Motor Jacks:
228R 536RX
326R 126RX
528RX 144RX
b. This publication is written in accordance
with standards set forth in the current ANSI
B30.1. To ensure reliable and long satisfactory
use of the air motor jacks, the instructions
contained in this publication should be closely
followed. Safety precautions to protect against
accidental injury or property damage should be
observed at all times while using the jacks. All
personnel concerned with the installation,
operation, inspection, and maintenance of the
jacks are urged to read American National
Standard (ANSI B30.1). That standard contains
important rules (some mandatory and some of an
advisory nature) designed to prevent or
minimize injury or otherwise protect life, limb,
and property. You should especially be aware of
the mandatory rules pertaining to inspection
requirements and advisability of maintaining
written, dated, and signed inspection reports and
records.
NOTE
The air motor jacks are recommended for
general industrial use.
1-2. Construction
The Duff Norton Air Motor Jacks consist of a
cast shell, a lifting mechanism made up of gears,
bearings, shafts, & pinions, and a lifting screw.
Models 228R, 326R, 528RX, 536RX, 126RX,
and 144RX are driven by an air motor and
require a source of compressed air for operation.
Carrying handles, wheels, and trundle handle for
transporting and positioning the jacks are
provided.
1-3. Technical Characteristics and
Operational Specifications
a. The user should be aware of the
capabilities of the air motor jack, especially its
load capacity. WARNING
Overloading can be hazardous to the jack,
operating personnel, and the load in the event
of jack failure.
b. See Table 1-1 for technical
characteristics of the jacks.
c. See Table 1-2 for operational
specifications for the jacks.
TABLE 1-1. TECHNICAL CHARACTERISTICS
228R 326R 528RX 536RX 126RX 144RX
Sustaining
Capacity, Tons 20 35 50 50 100 100
Lifting Capacity,
Tons 20 35 50 50 100 100
Height, Inches 28 26 28 36 26 44
Raise, Inches 18 14.375 17 25 13.75 30
Base Dia.,
Inches 12 14 14 15 13 18
Head Dia.,
Inches 4 4 5 5 6 1/8 6 1/8
Weight, Lbs. 240 275 394 425 448 630

2
TABLE 1-2. OPERATING SPECIFICATIONS
Jack Load (Tons) Average Rate* of Rise
(in/min) Cu. Ft. of Free* Air Required Per Minute
228R 0
10
20
25.7
11.2
4.6
180
140
90
326R 0
17.5
35
12.9
6.4
3.3
170
140
100
528RX
536RX 0
25
50
11.2
7.1
2.6
190
170
120
126RX
144RX 0
50
100
6.0
3.2
2.2
200
180
155
*Values are for jacks supplied with air of 100 psi dynamic air pressure at the air value entrance.
Section II
Inspection, Testing, and Maintenance
2-1. Inspection
The inspection classifications herein are
minimum requirements and should be
augmented when experience from operating
conditions indicate. See Table 2-1 for minimum
inspection schedule.
2-2. Inspection Classification
The jack inspection classification
consists of initial inspection prior to use and two
general classifications designated as Frequent
Inspection and Periodic Inspection, based upon
the intervals at which inspection would be
performed. The intervals in turn are dependent
upon the nature of the critical components of the
jack and the degree of their exposure to wear,
deterioration, or malfunction.
2-3. Initial Inspection
Any new or repaired jack shall be
carefully inspected prior to initial use. An
inspection shall be made by or under the
direction of a person familiar with air motor jack
operations and industrial safety standards.
a. Check for proper service of grease and
oil (refer to paragraph 2-8).
b. Make a detailed external inspection for
proper assembly. Check for any loose or
missing parts, such as cotter pins, springs, or
washers. Remove from service any jack
incorrectly assembled or with missing parts.
c. Operate the jack through at least one
lifting and lowering cycle while observing
lifting mechanism operation. During this check
it may be necessary to apply a light load to the
top to simulate proper operation. Remove from
service any jack which shows evidence of erratic
operation.
d. Perform load test in accordance with
paragraph 2-6.
2-4. Frequent Inspection
Visual examination by the operator or
other qualified designated personnel with
records not required.
a. Normal service—one month
b. Severe service—before each us or daily,
whichever is less frequent

3
FIGURE 2-1. INSPECTOR’S REPORT
Item Remarks (List Deficiencies and Recommended Action
Inspector’s Date Approved Date
Signature Inspected By
TABLE 2-1. MINIMUM INSPECTION SCHEDULE
Normal Service Severe Service
Minimum
Inspection
Schedule
Visual
Monthly* Record Yearly** Visual Before
Use***
Record
Yearly
Air Screen X X
Scored or
damaged control
rod
X X
Lubrication (refer
to para 2-9) X X
Cracked or
damaged housing X X
Damaged threads X X
Leaking oil X X
Scored or
damaged standard X X
Improper
functioning X X
Damaged top X X
Loose bolts or
rivets X X
Damaged or
improperly
assembled
accessory
equipment
X X
Motor blades As per Paragraph 2-6.a
Lifting Nut As per Paragraph 2-6.b
Periodic
Inspection
Same as Frequent
Inspection X X
Disassemble and
check for wear X**** X
*By Operator or designated personnel without records
**By appointed person making records of apparent external conditions to provide the basis
for continuing evaluation
***Or daily, whichever is longer
****If external conditions indicate internal difficulty

4
NOTE
In addition to the above, the standard, nut, and air motor blades should be inspected for wear every 100
jack lifts.
To inspect the worn blades, disassemble as necessary per paragraph 2-18 or 2-20 (depending on model
number). When blades on 50 and 100 ton jacks are worn to a thickness of 27/32” or less, they should be
replaced. When blades on 20 and 35 ton jacks are worn to a thickness of 13/16” or less, they should be
replaced.
To inspect the nut, remove the control lever (located in the chamber behind the handle) from the control
rod. Turn on air motor and run the standard out of the top of the jack. It is essential that the thread
section should not be worn down to a point where it will no longer safely sustain the load. The lifting nut
should be replaced if the axial play between it and a mating lifting screw exceeds the values in Table 2-2.
After inspection, be sure to place the control lever back in the proper position. Refer to Figure 2-2 or 2-3
as appropriate for throttle adjustment.
TABLE 2-2. MAXIMUM ALLOWABLE AXIAL PLAY BETWEEN NUT AND LIFTING
SCREW
Jack Model Maximum Axial Play
228R .10
326R .07
528RX/536RX .12
126RX/144RX .08
CAUTION
Any unsafe condition disclosed by the
inspection shall be corrected before operation of
the jack is resumed. Repairs should be
performed only by designated personnel.
c. The following shall be visually
inspected and observed during operation for any
deficiencies which might appear between
frequent inspections. The deficiencies listed
shall be carefully examined and determination
made whether or not they constitute a hazard. If
such a determination is made, the jack shall be
removed from service until the deficiency is
corrected.
(1) Check for scored or damaged control
rod.
(2) Check for scored or damaged standard
and keys.
(3) Check for any abnormal conditions,
loose cotter pins, cap screws, and nuts.
(4) Inspect all visible components for
condition and security of all parts.
(5) Check for adequate lubrication. (Refer
to paragraph 2-8).
(6) Check for foreign substance which may
damage or interfere with proper operation of the
jack. NOTE
A jack that has been idle for one year or more
shall be inspected in accordance with Frequent
Inspection (Table 2-1).
2-5. Periodic Inspection
Visual inspections by designated
qualified personnel, making records of apparent
external conditions, provide the basis for a
continuing evaluation.
a. Normal service—one year
b. Severe service—before each use or
daily, whichever is less frequent, unless external
conditions indicate that disassembly should be
done to permit detailed inspection.
c. Perform inspection in the same manner
as Frequent Inspections, except that records are
kept. A dated and signed inspection record shall
be kept on all Periodic Inspections. See Figure
2-1 for a typical “Inspector’s Record.”

5
NOTE
It is recommended that the Periodic Inspection
be performed by an Authorized Warranty
Service Center or appropriately trained
authorized individuals.
d. During Periodic Inspection, if external
appearance indicates possible internal difficulty,
the jack shall be disassembled for cleaning and
examination for internal wear or damage. See
Table 2-1 for Minimum Inspection Schedule.
2-6. Load Test
Any new, altered, or repaired jack shall
be tested for its ability to sustain its rated load
prior to regular use. The jacks shall be operated
to 100 percent of their capacity. See Table 1-1
for applicable load capacity.
2-7. Maintenance
The maintenance of the jacks shall
include lubrication, cleaning, and replacement of
defective parts during disassembly and
assembly.
2-8. Lubrication
a. Air motor:
Remove the filler plugs and fill with
Mobil DTE Oil Light (Duff p/n X6002) or
equivalent oil after every eight hours of use. Air
line filter lubrication should be used for this
jack. Rotor ball bearings should be coated with
grease each time the motor is disassembled.
b. Weekly lubrication for the jack:
(1) Standard, keys, and shut-off rod. Use a
light oil.
(2) Control valve parts. Use a light oil.
c. Monthly lubrication of the jack:
(1) Lubricate lifting screw through hole in
standard. Use Mobil DTE Oil Light (Duff p/n
X6002).
(2) Clean and lubricate handle latch and
throttle control parts. Use Mobil DTE Oil Light
(Duff p/n X6002).
(3) Remove grease level plug and check
grease level. Fill with Mobilgrease XHP 461 or
equivalent.
d. After repair or overhaul:
Drain, flush, and refill internal jack
mechanism with Mobilgrease XHP 461 or
equivalent.
e. Clean and grease wheels regularly.
f. Screw lubrication under heavy load use.
When operating the jack under heavy
loading, pump Mobilgrease XHP 461 grease into
the standard every few jack lifting cycles.
2-9. Cleaning
Clean the parts with any good acid-free
cleaning solvent. Stubborn deposits of dirt and
grease can be removed by using a stiff-bristled
brush dipped in the solvent. After drying, re-
lubricate before assembly.
CAUTION
Ensure that adequate ventilation is provided
when using cleaning solution. Wear protective
clothing and avoid prolonged contact with
solvent.
press control rod end pin (96) from control rod
end (97).
e. Remove control rod (99) and control
lever (78) from shell (27). Remove plunger (80)
and plunger spring (79) from control lever (78)

6
FIGURE 2-2. THROTTLE ADJUSTMENT FOR 228R AND 326R JACKS
FIGURE 2-3. THROTTLE ADJUSTMENT FOR 528RX, 536RX, 126RX, AND 144RX JACKS
Jack is properly adjusted when parts are in position shown in
drawing. The head is no less than 1/8” from top of shell. The
lug on stop lever “E” is against end of stop groove, and stop
“E” and throttle lever “F” are both in a horizontal position.
To make adjustments, pull out clevis pin “B.” Run jack down
until head is no less than 1/8” from top of shell. With throttle
lever “f” in a horizontal position, and step lever lug against
end of stop groove, sight through clevis pin hole, estimating
how much clevis should be run up or down so that holes in
clevis “C” and stop lever “E” line up. Run jack up
approximately ½.” Shut off air supply. Swing stop lever and
throttle to “up” position. Loosen check nut “A” and run clevis
up or down estimated distance on control rod “D.” Then run
jack down until head is no longer less than 1/8” from top of
shell. Set throttle lever in horizontal position and stop lever
lug against end of stop groove. Hoses in clevis and stop lever
should now line up. Replace clevis pin and re-tighten lock
nut. Check adjustment by running jack up and down. After
air motor shuts off, head should be no less than 1/8” from top
of shell.
Jack is properly adjusted when parts are in position show in
drawing at left. The head is no less than 3/16 from the top of
the shell. The control lever end “F” is against the end of the
stop groove. Pin “D” is against the end of the throttle lever.
Screw “D” is against the end of the throttle lever. Screw “B” is
in the hole “E” in the control rod.
To make adjustments, loosen nuts “A” and “C” and screw “B.”
Then screw control rod in or out of end until point “F” and pin
“D” are in the position shown, with the head no less than 3/16
from shell. Retighten screw “B” in hole “E” and lock the nuts
“A” and “C.”

7
Section III
Operation
3-1. Operational Requirements
a. The operator shall familiarize
him/herself with the jack, its capabilities, and its
operation. He/She should also know and
understand the mandatory requirements of
American National Standard (ANSI B30.1).
b. Models 228R, 326R, 528RX, 536RX,
126RX, and 144RX: The throttle lever is
located on the control valve above the air motor.
(1) To raise a load, pull the throttle lever to
UP.
(2) To lower a load, push the throttle lever
to DOWN.
(3) To cease movement of a load, place the
throttle lever in the horizontal position.
(4) The throttle lever will automatically
move to the horizontal position when the jack
has extended or lowered to its limit.
WARNING
The standard has a groove around it to indicate
when the jack is extended to maximum safe
height. Injury to personnel or damage to the
jack or load may result if the jack is extended
beyond this point.
3-2. Operating Procedures & Precautions
The following precautions shall be followed in
operations of the jack.
a. Visually inspect the jack before each
shift or each use, whichever is less frequent.
b. Determine if the load is within the load
rating of the jack. Refer to Table 1-1 for load
rating of the jack.
c. Support the jack at the base in such a
manner that it cannot shift under load.
d. Use shims or constraints to prevent
slippage of base or load.
e. Avoid off-center loading of the jack.
Assure that it is centered, plumbed and properly
blocked.
f. Do NOT use an extender.
g. Follow the load witih cribbing or
blocking where practicable.
h. take measure to prevent personnel from
working or passing under the load until the load
is secured against accidental lowering by
cribbing, blocking, or other means.
i. Ensure that all personnel are clear of the
load before lowering.
Section IV
Illustrated Parts List
4-1. General
This section contains exploded view illustrations
for the air motor jacks covered in this manual.
The number adjacent to each part is the index
number. Keyed to this index number on the
parts listing is the part name, part number, and
quantity required. When ordering parts for a
particular jack, please specify part name, part
number, quantity desired, and full jack
description, and serial number.
List of Illustrations
Figure No. Jack/Air
Motor No. Page No.
4-1 228R 8
4-2 326R 12
4-3 528RX/536RX 16
4-4 126RX/144RX 21
4-5 X3972A Air
Motor 26
4-6 X4153 Air
Motor 28

8
FIGURE 4-1. EXPLODED ILLUSTRATION OF 228R JACK