Sheffer MH User Manual

MH SERIES

Medium-Duty Hydraulic Cylinders Pressure Rating 800 - 2,000 PSI

Piston rods through 4" diameter have a minimum expected yield of 100,000 psi. They are case hardened to 50 Rockwell C to a depth of .030" for damage resistance. They are then hard chrome plated for wear and corrosion resistance. Larger diameter rods have an expected minimum yield of 50,000 to 60,000 psi depending on diameter and are hard chrome plated.

Offers much longer fatigue life through elimination of thread relief stress concentration point. Standard as Style 2 rod end on all rod sizes through 2

/2" diameter. Studs are pretorqued and locked in to prevent loosening. They are machined from high tensile steel and the threads rolled.

The steel tube is honed to an 8 to 16 microinch finish for low friction and long seal and piston bearing life. Tube ends are machined on the O. D. concentric with the I. D. They are confined by the close tolerance machining of the head and cap which provides greater hoop strength.

Maximum strength is obtained through a prestressed tie rod assembly.

Four wrench flats are provided as standard for easy attachment. Spanner holes, in lieu of flats, are standard on large diameter rods.

All pistons are machined from a fine grain alloy cast iron. They are threaded directly onto the piston rod, torqued, sealed and locked in place with one or more set screws.

The special piston seal is an endless glass filled Teflon material with an O-ring expander. One or more (depending on bore size) bronze filled Teflon bearing strips are also employed on this type piston to eliminate metal-to-metal contact. This type piston offers long life, low friction, near zero leakage, and great tolerance for side loading. It can be used successfully on virtually any application.

Pressure activated O-ring seals are used at rod gland and tube ends. Located to eliminate extrusion and to provide positive leak tight seal.

High load bearing bronze piloted into the head. Located inboard of the seals to insure a well lubricated bearing for the fastest cycling applications. It need not be removed for rod seal replacement.

The polyurethane wiper is designed to wipe off abrasive dust and contaminants on the retract stroke to insure long life for packings, rod bearing, and piston rod. Where the rod will be exposed to gummy materials such as road tar, a metallic rod scraper is available.

The polyurethane rod seal has a unique design which incorporates the optimum sealing properties of a U configuration with the elastomeric properties of a compressiontype seal. The polyurethane material was selected for toughness, abrasion resistance, and the ability to resist extrusion under rough service conditions.

Cushion pistons (29) are tapered to provide gradual deceleration and eliminate shock upon entrance. The Adjusting Screw with fine threads (30, 40) provides a wide range of adjustment. It is interchangeable with the Ball Check (36, 46) permitting field changes of position. Neither the adjusting screw nor ball check plug project beyond the head or cap surface.

When required, air bleeds are located where they can be employed most successfully – at the tube and head juncture. The straight thread plugs are equipped with metallic O-rings so they can be used repeatedly with a good seal every time.

Easily removable for replacement of rod seal and wiper. In most cases it is not necessary to demount or disassemble the cylinder. Easier to service since on removal of the ductile iron gland, the piston rod remains supported by the separate rod bearing.

DIMENSIONALLY INTERCHANGEABLE TO MEET ANSI SPECIFICATIONS

Construction

ITEM QUANTITY

NUMBER

DESCRIPTION

REQUIRED 1 HEAD 1 2 CAP 1 3 PISTON ROD 1 3A STUD – STYLE II THREAD THRU 21/2" ROD DIA. 1 4 TUBE 1 5 TIE ROD 4 6 ROD GLAND RETAINER 1 6A ROD GLAND AND RETAINER – SINGLE PIECE 1 9 PISTON – SLIPPER SEAL TYPE 1

10 RETAINER SCREW ‡ 13 TIE ROD NUT 4 16 † TUBE SEAL 2 18 † PISTON SEAL – SLIPPER SEAL TYPE 1 18 A† EXPANDER – FOR SLIPPER SEAL 1 21 † ROD BEARING 1 22 † ROD GLAND SEAL 1 24 † ROD WIPER 1 25 † ROD SEAL 1 29 CUSHION PISTON – FRONT ** 30 CUSHION ADJ. SCREW – FRONT (CROSS SLOT) ** 31 SEAL – CUSHION ADJUSTING AND CUSHION

CHECK – FRONT **

36 CUSHION CHECK BALL – FRONT ** 38 CUSHION CHECK PLUG – FRONT ** 40 CUSHION ADJ. SCREW – REAR (CROSS SLOT) ** 41 SEAL – CUSHION ADJUSTING

AND CUSHION CHECK – REAR **

46 CUSHION CHECK BALL – REAR ** 48 CUSHION CHECK PLUG – REAR ** 57 PISTON BEARING STRIP 1 58 AIR BLEED PLUG ** 66 A BACK-UP WASHER – CUSHION ADJUSTING

AND CHECK – FRONT **

66 B BACK-UP WASHER – CUSHION ADJUSTING

AND CHECK – REAR **

70 ROD GLAND 1

‡Retainer Screws required varies by bore and mount †Recommended Spare Parts **As required; specify if cushioned front, cushioned rear or cushioned both ends.

Piston Rod

Tube

Tie Rod Construction

Wrench Flats

9&18

Pistons & Piston Seals

Rod Bearing

Rod Wiper

Rod Seal

Air Bleeds (Optional)

Rod Gland

Studded Rod End

Parts List

16, 22

Static Seals

Cushions

MH-1

Round, single piece rod gland and retainer used on all but some of the smaller bore sizes. Consult pages on specific mounts.

66A

1 1/2" THRU 8" BORE SIZES

Parts List

36 46

66B

66A

66B

1033A

7 24

25 22 21 16 4

29 18

18A

57 58 2 13

66AA

Ordering Information:

Also see separate ordering information. When ordering parts, the Model No.and Serial No. must be specified. Give item no., name and quantity of part desired. The Model No. and Serial No. will be found on a metal plate that has been drivescrewed to either the head or the cartridge retainer.

Please Note:

Complete replacement packing kits are available. For purposes of economy and less down-time, it is recommended that replacement packing kits be stocked. They are described and priced in the current Sheffer Replacement Parts Price List. Contact your distributor or the factory for these lists.

MH-2

ITEM QTY.

NUMBER DESCRIPTION REQ'D

100 FRONT FLANGE 1 102 FRONT FLANGE EXTRA 1 103 REAR FLANGE 1 104 REAR FLANGE EXTRA 1 105 FOOT BRACKET – FRONT 1 106 FOOT BRACKET – SCREW 2 107 FOOT BRACKET – REAR 1 112 CLEVIS PIN 1 117 INTERMEDIATE TRUNNION 1 108 END LUG – FRONT 2 110 END LUG – REAR 2

BORE TORQUE

11/8 8 11/2 8

2 15 21/2 15 31/4 30

4 30

5 55

6 60

7 140

8 140

HEX SOCKET

PISTON HEAD HEAD

BORE ROD CAP CAP

SIZE DIAMETER SCREW SCREW

11/8

/8 7.7

11/2 ALL 4.0

2 ALL 7.5

/8, 1 4.5

13/8, 13/4 7.5

1, 13/8, 13/4 4.5

2 13.5

4 ALL 4.5

1, 13/8, 13/4, 2, 21/2 4.5

3, 31/2 8.0

13/8, 13/4, 2, 21/2 4.5

3, 31/2, 4 8.0 13/8, 13/4, 2, 21/2 4.5 3, 31/2, 4, 41/2, 5 8.0 13/8, 13/4, 2, 21/2 4.5

3, 31/2, 4, 41/2, 5, 51/2 8.0

31/4

BORE SIZE ROD DIAMETER NUMBER

11/8, 11/2, 2, 21/2 ALL 4

31/4 1, 2 4 31/4 13/8, 13/4 8

4 1 4 4 13/8, 13/4, 2, 21/2 8 5 1 4 6 ALL 8 7 13/8, 13/4, 2, 21/2 8 7 3, 31/2, 4, 41/2 8 7 5 12 8 13/8 THRU 41/2 8 8 5, 51/2 12

FRONT FLANGE MOUNT

STYLE FF

REAR FLANGE MOUNT EXTRA SIZE STYLE RFX

FRONT FLANGE MOUNT EXTRA SIZE STYLE FFX

FOOT BRACKET MOUNT STYLE FB

INTERMEDIATE TRUNNION MOUNT STYLE T

REAR FLANGE MOUNT STYLE RF

CLEVIS MOUNT STYLE C

END LUG MOUNT STYLE EL

Parts List

100

107

102

112

103

104

110

108

106

105

117

Parts List

Tie Rod Torque in Foot Pounds

Specifications Rod Gland Retainer Screw Torque Information

Screw Torque in Foot Pounds

Retainer Screw Chart

MH-3

Sheffer pioneered tapered cushions, designed to provide gradual deceleration and eliminate shock upon entrance of the cushion pistons, have now been considerably improved. The tapered cushion has been married with a fine thread, wide range, adjusting screw. This new combination offers a positive, low-shock deceleration and a method to adjust the cushioning effect for speeds and loads.

The adjusting screw is identified by a tag affixed to the head (or cap) and can be further distinguished by a cross-slot in the head of the screw. It does not project beyond the surface of the head (or cap) through its full range of adjustment so no clearance need be considered on close fit installations. The adjusting screw and the cushion check can be interchanged in the same cylinder end. This flexibility can be important if, after installation, it is discovered that the adjusting screw is inaccessible.

The cushion check, which does not require adjustment, has a single slot in its head. It does not project beyond the surface of the head (or cap). The cushion check plus the tapered cushion piston provides rapid acceleration out of cushioning. There is no spring in the cushion check to fatigue, hence, no worry of mechanical failure.

Cushioning is designed to properly cushion the cylinder and is not intended to cushion large inertia loads. Cushions do not substitute for speed controls or deceleration valves on most installations.

As indicated on page MA-6, the standard positions for ports are 1 and 5. Where possible, the standard positions for cushion adjusting screws will be 2 and 6 and the standard positions for cushion checks will be 4 and 8. With some mounting styles, it is not possible to so locate the adjusting screws and checks. For example, a Trunnion Front Mount has the trunnion pins located in positions 2 and 4 on the head. With the port in position 1, the only side available for both adjusting screw and check is position 3. Since both will then be located on the same side, they will be located off-center. This example would hold true with the TR, CL, FHF and RHF mounts. See Chart A for standard positions that will be supplied unless otherwise specified. When requested, other positions can be supplied so long as there is no interference with mounting.

Where access to an adjusting screw or check could be made difficult because of proximity to a mount, the locations of the screws will be slightly off-center. An example of this would be a small bore cylinder with a side lug mount.

Because of space limitations, neither cushion adjusting screws nor cushion ball checks can be put into 11/2" and 2", 21/2" bore sizes for cushioned front when they are specified with 2:1 rod diameters.

The chart below shows the recommended working pressures for MH Series cylinders by bore and rod diameters. Note that the column“Operating Pressure” is based on a 3:1 safety factor. It is felt that this is an adequate safety factor for any well designed hydraulic system where shock conditions have been considered and reduced to an acceptable level.

The “Max. Shock Service” column is based on a 2:1 safety factor and SHOULD NOT be used to determine operating pressures.

All values on the adjacent chart are based on the cylinder as a pressure vessel. Use of the proper mounting style to withstand the thrust generated must be considered.

The following factors in shock loading should be considered:

 Relief valves in the circuit do not

protect the components from shock because of the time lag.

 Gauges do not necessarily register

shock conditions, either because of their location in the circuit, or the short duration of the shock.

 The two general types of shock loading

to be considered are pressure rise caused by quick stop of the flow in the circuit and quick pressure drop. Decompression shock is particularly important in large bore cylinders and can be as destructive as compression shock.

Cushions

Pressure and Shock

OPERATING MAX. SHOCK

PRESSURE SERVICE

PISTON 3:1 SAFETY FACTOR 2:1 SAFETY FACTOR

BORE ROD BASED ON YIELD BASED ON YIELD

SIZE DIAMETER IN PSI IN PSI

11/8

/8 3,600 5,400

11/2 ALL 2,250 3,375

/8 1,400 2,100

1, 13/8 2,450 3,675

/8, 1 900 1,350

13/8, 13/4 1,550 2,325

31/4 ALL 1,400 2,100

4 ALL 925 1,390

1, 13/8, 13/4 675 1,000

BALANCE 1,075 1,600

6 ALL 800 1,200

13/8, 13/4 625 940

BALANCE 875 1,300

13/8, 13/4 475 700

BALANCE 675 1,000

Cushions and Pressure

CUSHION

ADJUSTING CUSHION

MOUNT SCREW CHECK

TF AND FHF 3 and 6 3 and 8

CL 3 and 7 3 and 7

TR AND RHF 2 and 7 4 and 7

ALL OTHER

MOUNTS 2 and 6 4 and 8

Standard positions for cushion adjusting screws and cushion checks in relation to port positions by style of mounting.

Chart A

Position Diagram for Ports,

Air Bleeds, Cushion Adjusting

Screws and Cushion Checks

Maximum Pressure Ratings

Specifications

Cylinder Weight Chart

BORE 11/8 11/2 2 21/2 31/4 4 5 6 7 8

ZERO STROKE 3 6 8 11 22 30 45 70 85 100 ADD PER INCH

OF STROKE .25 .35 .6 .9 .9 1.2 1.7 2.5 3 4

NOTE: The above weights are based on an average value for cushioning, rod side, and the various types of mountings for uncrated cylinders to establish approximate shipping weights. Add 10% of cylinder weight to determine estimated weight of crated cylinder.

MH-4

BORE FA FK

11/8 .3120

/16

11/2 .3120

/16

2 .3120

/16

21/2 .3120

/16

31/4 .5620

/16

4 .5620

/16

5 .5620

/16

6 .6870

Thrust Key Bore Sizes

Tandem Cylinders and Multi-stage Cylinders

The tandem cylinder (Figure A) has two pistons connected to a common rod, resulting in twice the force output of a single cylinder. Multi-stage cylinders

(Figure B) offer multiple, positive

strokes by pressurizing one cylinder, the other, or both. Contact the factory for other variations.

Rod Gland Drain Back

When not even a drop of external leakage can be tolerated, the rod gland drain back provides a signal that the rod seal set has worn to the point of replacement – without the danger of contamination from leakage.

External Rod Seal

When a cylinder is to be operated under water, provision is made to prevent the water from being drawn into the cylinder at the time of valve shift or pressure differential.

Stainless Steel Piston Rods

Many applications, especially those subjected to water spray, require the use of stainless steel piston rods. We stock AISI Type 304 hard chrome plated, stainless steel and will furnish that type unless otherwise specified. Type 304 is considered a good, corrosion resistant type of stainless steel, but the minimum expected yield is approximately 35,000 psi and that factor must be considered with respect to operating pressure, column loading, etc.

FIGURE B

FIGURE A

Adjustable Stroke

Shown is an integral stroke adjustment (externally adjusted) that is accomplished by the use of a bump rod threaded into the cylinder cap. Seals are incorporated to prevent external leakage and a lock nut is included.

Thrust Key

All side mounted cylinders (SF, FB, EL and SL mounts) can be supplied with thrust keys. Thrust keys are available in bore sizes 1

/8" thru 6". Extending the rod gland retainer, as shown, provides a key which fits into a milled slot in the mounting surface of the machine member. Combined with the mount this key assures that cylinder will not shift in severe service.

Spherical Bearings

Pivot mounting brackets and rod eyes can be provided with spherical bearings to compensate for misalignment on both ends of cylinders. Consider also the use of the Sheffer Uni-Lign described in separate Accessories Brochure.

Non-Rotating Piston Rod

Two methods of providing nonrotating piston rods are employed. The internal rod type

(Figure A)

is generally used since it requires less space and is neater. The type shown in Figure B must be used on small bore cylinders where internal space is limited.

FIGURE A

FIGURE B

The Sheffer Corporation manufactures many cylinders with variations to meet special customer needs. In addition to those illustrated below, some of the more popular variations are:

• Cylinders with Boots

• Combination Mount Cylinders

• Cylinders with Built-In Limit Switch Actuators

• Locking Cylinders

• Precision Stroke Cylinders

• Precision Mount Cylinders

• Many More

FA ± .0005

Special Variations

MH-5

Air Bleeds

An air bleed may be ordered at either or both ends of the cylinder as an option. To provide for maximum bleeding of air from the cylinder, Sheffer places its air bleeds in the tube to bleed air from the tube/head or tube/cap juncture. The air is bled from the cylinder by backing out the straight thread metallic seal plug to allow air to pass by the threads. When air bubbles stop and oil starts to flow, retighten plug. It is recommended that bleeding be done with pressure on the opposite end of the cylinder so that the bleed plug is not subjected to pump pressure when being backed out. Air bleeds should always be positioned at the highest point of the cylinder tube. Please specify positions of air bleeds by position number from the chart. NOTE: Since Sheffer puts air bleeds in the cylinder tube, position can be changed by loosening the tie rods and rotating the tube. Photos and Line Drawings show ports in positions 1 and 5.

Porting

SAE straight thread Ports, located in positions 1 and 5 (See above) are standard and will be furnished unless otherwise specified. Other types and sizes of ports are available on request, at slight additional cost.

Port Positions – Where mounting clearances permit, the ports can be in any of four positions in the head and in the cap at no extra cost. Indicate both port positions desired by position number. If no preference is stated, ports will be furnished in positions 1 and 5. NOTE: The head and cap can be rotated in relation to each other as long as mounting and porting are convenient for installation.

Strongly Recommended

S.A.E. Straight Thread Ports –

S.A.E. straight thread O-ring sealed ports are standard. This type of port offers positive seal with full thread engagement. It also eliminates the problem of faulty pipe threads since sealing takes place independently of the thread. No messy pipe dope to bother with or to contaminate the hydraulic system. No wedging, distortion, or breakage due to overtightening. Alignment and full sealing are both assured since the fittings can be tightened after lining up. Straight thread fittings may be reused, indefinitely. NPT ports are available at no extra cost.

Cushions – The standard positions for ports are 1 and 5. Where possible, the standard positions for cushion adjusting screws will be 2 and 6 and the standard positions for cushion checks will be 4 and 8. With some mounting styles, it is not possible to so locate the adjusting screws and checks. For example, a Trunnion Front Mount has the trunnion pins located in positions 2 and 4 on the head. With the port in position 1, the only side available for both adjusting screw and check is position 3. Since both will then be located on the same side, they will be located off-center. This example would hold true with the TR, CL, FHF and RHF mounts. See Chart A for standard positions that will be supplied unless otherwise specified. When requested, other positions can be supplied so long as there is no interference with mounting.

Because of space limitations, neither cushion adjusting screws nor cushion ball checks can be put into 1

/2", 2" and 21/2" bore sizes for cushioned front when they are specified with 2:1 rod diameters.

Special Variations

The Sheffer Corporation manufactures many cylinders with variations to meet customer special needs. Some of the most popular variations are:

• Cylinders with Boots

• Combination Mount Cylinders

• Precision Stroke Cylinders

• Tandem and Multi-stage

Cylinders

• Adjustable Stroke Cylinders

• Non-rotating Rod Cylinders

• Cylinders with Stainless Steel

Piston Rods

• Cylinders for Underwater

Service

• Many More

Please request a quotation for any special requirement.

Position Diagram for Ports,

Air Bleeds, Cushion Adjusting

Screws and Cushion Checks

Cushions, Porting and Air Bleeds

CUSHION

ADJUSTING CUSHION

MOUNT SCREW CHECK

TF AND FHF 3 AND 6 3 AND 8

CL 3 AND 7 3 AND 7

TR AND RHF 2 AND 7 4 AND 7

ALL OTHER

MOUNTS 2 AND 6 4 AND 8

Chart A Standard Positions for Cushion Adjusting Screws and Cushion

Checks in Relation to Port Positions by Style of Mounting.

MH-6

FIGURE A

FIGURE B

FIGURE C

FIGURE D

FIGURE E

VARIANCES

Construction

Variances in Construction

There is a construction variance in the 11/8", 11/2", and 2" bore sizes, and the 21/2" bore with the 13/8" and 13/4" rod diameters, and the 31/4" bore with a 2" rod diameter. The round rod gland retainer shown on the preceding pages is not employed on these sizes. A square retainer, the same square size as the head is used instead.

Side Lug (SL) and Centerline Lug (CL) Mounts – The retainer is held in

place with retainer screws that thread into the head. The rod gland can be removed without loosening the tie rods in all sizes. See Fig. A.

End Lug (EL) Mount – The bottom two tie rods utilize the lugs as nuts and the top two tie rods have tie rod nuts. The rod gland cannot be removed without loosening the tie rods. See Fig. B.

Trunnion Front (TF) and Trunnion Rear (TR) Mounts – The retainer is held

in place by retainer screws that thread into the head and the rod gland can be removed without loosening the tie rods in all sizes. See Fig. C.

Intermediate Trunnion (T) Mount –

The retainer is held in place with tie rod nuts and the rod gland cannot be removed without loosening the tie rods in these sizes. See Fig. C.

Clevis (C) Mount – The retainer is held in place with tie rod nuts and the rod gland cannot be removed without loosening the tie rods in 1

/8" and 11/2"

bore sizes only. Side Flush (SF) Mount – The retainer is

held in place by retainer screws that thread into the head and the rod gland can be removed without loosening the tie rods in all sizes. See Fig. D.

Trunnion Mounts Note:

Pillow blocks of ample size and rigidity should be provided and should be mounted as close to the head or cap as possible. Bearing should be provided for the full length of the trunnion pin.

All trunnion cylinders need provision on both ends for pivoting in one plane. Alignment in the other direction is essential to avoid excessive side loading. Where two-direction pivoting is necessary, consult with our distributor for specific recommendations. Do not use spherical bearing Pillow Blocks.

End Lug Note:

When specifying an End Lug mount, carefully check the distance between the rod end and the lug to determine sufficient clearance for the rod end attachment. It may be necessary to add extra plain rod extension to move the threaded rod end out beyond the lug.

Side Lug Note:

When specifying a Side Lug mount with the ports on the side (port positions 2, 4, 6 or 8), be sure that there will be enough clearance between the port fitting and the lug to insert a bolt or cap screw into the

lug. In small bore sizes, it may be necessary to employ a pipe nipple to easily pipe the port.

Variances in Construction – Flange Mount Cylinders

There is a construction variance in some bore and rod size combinations where it is not possible to utilize the round, cap screwed, rod gland retainer. Affected dimensions can be determined by Fig. E.

Front Flange (FF) and Front Flange Extra (FFX) Mounts – On the bore and

rod combinations affected, the tie rods thread into the flange and the flange serves as the rod gland retainer. Tie Rod nuts are employed on the cap end. The rod gland cannot be removed without loosening the tie rods in these sizes. See chart on page MH-10 for combinations affected.

Front Head Flange (FHF) Mount –

On the bore and rod combinations affected, the retainer is rectangular, the same size as the head, and the tie rods thread into it. Tie rod nuts are employed on the cap end. The rod gland cannot be removed without loosening the tie rods. See chart on page MH-10 for combinations affected. Mounting bolts should be sized to clear through both the head (G dim.) and the rectangular retainer thickness (FF dim.).

Rear Flange (RF), Rear Flange Extra (RFX) and Rear Head Flange (RHF) Mounts – On the bore and rod combi-

nations affected, a square retainer, the same square size as the head, is employed. The retainer is cleared for the tie rods, and tie rod nuts secure it. The rod gland cannot be removed without loosening the tie rods. The combinations affected are shown in the chart on page MH-12.

THREAD

BORE ROD DIA. DEPTH

11/8

/16

/8, 1, 13/8

/16

/8, 1, 13/8

13/4

/16

1, 13/8, 13/4

1, 13/8, 13/4, 2

21/2

/16

1, 13/8, 13/4,

2, 21/2 11/4

/16

31/2

13/8, 13/4, 2,

21/2, 3, 31/2 11/8

4 1

13/8, 13/4, 2,

21/2, 3, 31/2,

4, 41/2 11/8

5 1

8 ALL 11/8

NOTE: Side flush mounting is available with usable thread depths shown above.

11/2

21/2

31/4

Side Flush Note: Thread Depth and Slide Flush Mounting Availability Chart

MH-7

END LUG (EL) VARIANCE

TRUNNION FRONT (TF) VARIANCE

SIDE LUG (SL) VARIANCE

SIDE FLUSH (SF) VARIANCE

FX AND BX MOUNTS

Variances in Construction – Tie Rods Extended Mounts

There is a construction variance in the 11/8", 11/2" and 2" bores, and the 21/2" bore with a 13/8" and 13/4" diameter rods, and the 31/4" bore with a 2" diameter rod. The round rod gland retainer is not employed on those sizes. A square retainer, the same square size as the head, is used.

On the FX and BX mounts, the retainer is secured by tie rod nuts and the rod gland cannot be removed without loosening the tie rods.

On the RX and NX mounts, the retainer is secured by retainer screws that thread into the head and the rod gland can be removed without loosening the tie rods.

Variances in Construction – Double Rod End Cylinders

There is a construction variance in the 11/8", 11/2" and 2" bore sizes, and the 21/2" bore with 13/8" and 13/4" diameter rods, and the 31/4" bore with a 2" diameter rod. The round rod gland retainers shown on the adjacent page are not employed on these sizes. Square retainers, the same square size as the head, are used instead.

Side Flush (SF), Side Lug (SL), Centerline Lug (CL), Trunnion Front (TF), and Trunnion (T) Mounts – The rod gland retainer on

one end is secured with retainer screws that thread into the head. On that end, the rod gland can be removed without loosening the tie rods. On the opposite end, the retainer is secured by tie rod nuts and the rod gland on that end cannot be removed without loosening the tie rods in these sizes.

End Lug (EL) Mount – The lugs serve as nuts on both ends on the bottom two tie rods to secure the square rod gland retainers and tie rod nuts are used on both ends on the top two tie rods for that purpose. The rod gland cannot be removed without loosening the tie rods in these sizes.

Front Head Flange (FHF) Mount –

A rectangular retainer, the same size as the head, is employed on the mount end and a square retainer, the same size as the opposite end head, is used on the other end. The tie rods thread into the retainer on the mount end and tie rod nuts are used on the opposite end. Neither rod gland can be removed without loosening the tie rods in these sizes. Note that when mounting, mounting bolts must be long enough to clear through both the head (G dim.) and the retainer (FF dim.).

Front Flange (FF) and Front Flange Extra (FFX) Mounts –

In addition to the sizes mentioned above, in these mounts the construction variance also applies to the 4" bore with a 21/2" diameter rod, and the 5" bore with a 31/2" diameter rod. The tie rods thread into the flange on the mount end and the flange retains the rod gland. On the opposite end, a square retainer, the same square size as the head, is employed. It is secured by the rod nuts. Neither rod gland can be removed without loosening the tie rods in these sizes.

For Cylinder Dimensions, See Pages MH-10 through MH-19.

B.C. DIA.

LB + STROKE

MM ROD DIA.

P + STROKE

ZT + STROKE

ZB + STROKE

RD -.001

-.003

TIE RODS EXTENDED MOUNTS

EXTENDED FRONT MOUNT – STYLE FX (ANSI MX3) EXTENDED REAR MOUNT – STYLE RX (ANSI MX2) EXTENDED BOTH MOUNT – STYLE BX (ANSI MX1) EXTENDED NEITHER MOUNT – STYLE NX (ANSI MX0)

TIE ROD EXTENDED MOUNT CYLINDERS

Mountings

MH-8

+ 19 hidden pages