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Flywheel Couplings
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GUARDEX
Type FBA Flywheel Coupling

  • The Guardex™ "FBA" (Flywheel­Blind Assembly) coupling is a torsionally soft hydraulic pump drive used worldwide in gas/diesel engine applications including aerial high lifts, skid steer loaders, excavators and low mass compressors.
  • Flywheel flanges available in SAE 6-1/2 thru 14 inclusive, with many metric options available. Pump mounting plates and bell housings also available.
  • No cross clamping required. Absorbs shock and temperatures to 212°F.

For a PDF version of this document, click here.

Type FBA Flywheel Coupling

Technical Information

The Guardex™ FBA (flywheel-blind assembly) was designed in response to engineers that required a torsionally soft drive system with "plug in" capability. This flywheel coupling consists of a steel flywheel flange (zinc clear chromate protected), heat treated steel hub (can be splined or bored/keyed), rubber vibration dampers and specially designed fasteners (no nuts required!).

Engine Side/Pump Side


MISALIGNMENT CAPABILITY
Angular = 1°
Parallel = .015


NOTE!!
The end-user is required to use a lithium-based grease on pump spline and coupling at installation. Guardian recommends Texaco1912 or equivalent.

Dimensional Information
(Click SAE Size for diagram)

SAE 6 1/2
SAE 7 1/2
SAE 8
SAE 10
SAE 11 1/2
SAE 14
COUPLING ASSEMBLY NOMINAL TORQUE MAX TORQUE
SAE 6.5 3,450 IN# 8,625 IN#
7.5 3,450 IN# 8,625 IN#
8 7,325 IN# 18,312 IN#
10 9,204 IN# 23,210 IN#
11.5 15,000 IN# 37,500 IN#
14 15,000 IN# 37,500 IN#

SAE Pump/Pump Shaft Data

SAE Mounting Flanges

SAE Flywheel Specifications

Special Aluminum Pump Mount Castings
Nominal Clutch Diameter A B C D G H J Tapped Holes No.    Size
6 1/2 7.25 8.500 7.875 5.00 1.19 0.50 0.38 6 5/16-18
7 1/2 8.12 9.500 8.750   1.19 0.50 0.50 8 5/16-18
8 8.88 10.375 9.625   2.44 0.50 0.50 6 3/8-16
10 10.88 12.375 11.625 7.75 2.12 0.62 0.50 8 3/8-16
11 1/2 12.38 13.875 13.125 8.00 1.56 1.12 0.88 8 3/8-16
14 16.12 18.375 17.250 8.75 1.00 1.12 0.88 8 1/2-13

Special Aluminum Pump Mounting Castings

ENGINE  REFERENCE INFORMATION
Briggs Daihatsu Used on DM700/950 engines, with special modified Guardex FBA 150mm assembly.
Deutz F2/3/4/L1011 Used on Deutz Housing #0553, where flywheels 1771(SAE 8) and 1772
(SAE 6-1/2) are optional.
Isuzu "L" Used on "L" Series engines with Guardex FBA SAE 7.5 assembly. Fits engine flywheels # 8-97091-412-2, # 8-97091-410-1, and backplate # 8-97251-734-0. Bell housing is iron and painted for corrosion protection.
Kubota Super Mini
(B-1 Mounting)
Used on engines Z400, D600, D722, V800, WG600 and WG750.
Use with Guardex™ FBA 150 mm coupling assembly.
Kubota Super 3
(B-1 Mounting)
Used on engines D1403, D1703, V1903 and V2203
KTC/Euro/U.S. Design.
Kubota Super 5
(B-1 Mounting)
Used on engines D905, D1105, V1205, V1305 and V1505.
Use Guardex™ FBA-135 mm coupling assembly.
GM 3.0/4.3L Used with GM flywheel # 93422872. Use with Guardex™ FBA SAE10 assembly.
Nissan "A" Used on A15 Series engines with special FBA SAE 7.5 EXT assembly.
Nissan "H" Used on H15/20/25 Series engines with with special FBA 8 assembly (adaptor/spacer ring included for piloting). Bell housing is iron and painted for corrosion protection.
PK 103-9-10 Used on Perkins rear end plate designs. Use with Guardex™ FBA 135 mm assembly.
PK 103-13-15 Used on Perkins rear end plate designs. Use with Guardex™ FBA-155 mm assembly.
PK 104-22 Used on Perkins rear end plate designs. Use with Guardex™ FBA-155 mm assembly.
Ford VSG413 Used on Ford backplate design. Use with Guardex™ FBA SAE 7.5 assembly.
Ford LRG425 Used on Ford backplate design. Use with Guardex™ FBA SAE 8 assembly.
Cummins B3.3 Used on Semi SAE#4 housing. Use with Guardex™ FBA SAE 10 assembly.
Yanmar 3/4TNE Used on E-2/EB-5 backplate design. Use with Guardex™ FBA SAE 7.5 assembly.
These castings are used in conjunction with Guardex™ Type FBA Flywheel couplings where short axial distances prohibit use of a flat mounting plate. These lightweight, compact and economical castings extend beyond the flywheel to offer a quick, reliable pump drive connection.



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