Bimba Flat Squar User Manual

Assembly Instructions

Flat-1 and Flat Square

General Repair Instructions

K-B-FO- , K-B-FS-

Disassembly

1) Using the appropriate allen wrench, remove the 4 (8 for long stroke versions) body bolts from the

endcap(s). (Use extreme caution, single acting models contain springs so the contents may be
pressurized.)

2) Remove the body posts from the assembly.

3) Remove the rod guide and rear head from the body. (Please take note of spring placement, if

applicable)

4) For cylinders with Viton option, please skip to step 6.

5) Install provided snap ring into the rod guide and press out rear bushing as shown in Figure 1.

6) Remove the rod seal from the rod guide. (For cylinders with Viton option, a pick may be needed.)

7) For cylinders with Viton option, please skip to step 9.

8) Press the front bushing out as shown in Figure 2.

9) Remove the body seals from rod guide and rear head.

10) Remove the piston seal(s) from the piston/rod assembly.

PISTON/ROD ASSEMBLY

BODY SEAL

ROD GUIDE

PISTON SEAL(S)

BODY

REAR BUSHING

ROD SEAL

FRONT BUSHING

BODY POST (SEE NOTE)

REAR HEAD

BODY BOLT (SEE NOTE)

BODY SEAL

FRONT BUSHING

ROD GUIDE

SNAP RING

REAR BUSHING

ROD GUIDE

FIGURE 1

FIGURE 2

(see reverse side for reassembly instructions)

Bimba Manufacturing Company
Monee, IL 60449-0068
Telephone: [phone]
Fax: [phone]
Email: [e-mail]
www.bimba.com

NOTE: FS MODELS WILL HAVE BODY POSTS REPLACED BY TIE RODS
AND BODY BOLTS REPLACED BY TIE NUTS AS SHOWN BELOW:

TIE ROD

.50 PIN (NOT SUPPLIED)

.63 PIN (NOT SUPPLIED)

FRONT BUSHING

TIE NUT

ROD SEAL

Form: BMS-1019

rev. 1: EC-37791

To learn more about this

product, scan this QR code

with your mobile device.

Assembly Instructions

Flat-1 and Flat Square

General Repair Instructions

K-B-FO- , K-B-FS-

Reassembly

1) Lightly lubricate all of the new seals.

2) For cylinders with Viton option, please skip to step 4.

3) Press in the new front bushing into the rod guide as shown in Figure 3.

4) Install the new rod seal into the rod guide behind the front bushing. (For Viton option cylinders,

the seal will be installed in between the front and rear bushings.)

5) For cylinders with Viton option, please skip to step 7.

6) Press in the new rear bushing into the rod guide as shown in Figure 4.

7) Install the new piston seal(s) onto the piston/rod assembly.

8) For spring retract models, install the spring onto the rod/piston assembly

9) Install the new body seals into the rod guide and rear head.

10) Carefully install the rod guide assembly onto the rod/piston assembly. (Use extreme caution,

single acting models contain springs so the contents may be pressurized.)

11) For spring extend models, install the spring back into the piston end of the rod/piston assembly.

12) Install the body into the rod guide. (Be careful not to damage the body seal.)

13) Install the rear head onto the body. (Be careful not to damage the body seal.)

14) For single acting models, the sub-assembly may need to be compressed with an arbor press.

15) Install the 4 posts back in between the rod guide and rear head.

16) Install the 4 (8 for long stroke versions) body bolts back into the rod guide and rear head.

17) Torque the bolts to the applicable values in Table 1. (See Table 2 for FS models.)

ROD GUIDE

FLUSH

FLUSH

FIGURE 3

FIGURE 4

.63 PIN (NOT SUPPLIED)

FRONT BUSHING

.63 PIN (NOT SUPPLIED)

REAR BUSHING

(see reverse side for disassembly instructions)

Bimba Manufacturing Company
Monee, IL 60449-0068
Telephone: [phone]
Fax: [phone]
Email: [e-mail]
www.bimba.com

Table 1: Flat-1 Torque Specication

Bore

Size

9/16", 3/4",

1-1/16"

1-1/2", 2" #10-24 35 (2.9) 19 (1.6)

2-1/2", 3" 1/4-20 90 (7.5) 41 (3.4)

4" 5/16-18 150 (12.5) 87 (7.2)

Screw

Size

#4-40 7 (.58) 3.5 (.29)

Torque: in-lb (ft-lb)

Standard “S” Option

Table 2: Flat Square Torque Specication

Bore

Size

3/4", 1-1/16" #5-40 10 (.83)

1-1/2", 2" .185-24 30 (2.5)

2-1/2" 1/4-28 35 (2.9)

3" 5/16-24 90 (7.5)

4" 3/8-24 150 (12.5)

Screw

Size

Torque: in-lb

(ft-lb)

Form: BMS-1019

rev. 1: EC-37791

To learn more about this

product, scan this QR code

with your mobile device.