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Flywheel Couplings
GUARDEX FL | GUARDEX FLD | GUARDEX FBA | GUARDEX FH | GUARDEX HH
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GUARDEX
Type FL Flywheel Coupling

  • Minimum space: The entire coupling length is normally mounted inside the housing compartment requiring only a flat steel pump mounting plate which we also manufacture. Rear end plate designs also available for Kubota, Perkins, Ford, GM, Nissan, and Deutz engines.

  • Free axial travel: Crowned teeth slide freely in the nylon spline with a +-.080" axial travel. Any shaft float is absorbed by the coupling and not transmitted to the pump components.

  • Blind assembly: Pump hub gear ring fits through the pilot hole of the plate. Faster assembly at lower cost and no inspection ports or hand holes necessary.
 Type FL Flywheel Coupling
  • Crowned gear teeth: Provides for angular misalignment, preventing angular force on the pump shaft bearings and seals.

  • Heat Stable: Fiberglass reinforced nylon designed to operate in diesel engine ambients without air circulation. Dimensionally stable to 250°F.
Type FL Flywheel Coupling
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SAE PUMP/PUMP SHAFT DATA

SAE Pump/Pump Shaft Data

Special Aluminum Pump Mount Castings SAE FLYWHEEL DIMENSION REFERENCE
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

TYPICAL FLYWHEEL HOUSING COMBINATIONS

 Clutch Size

Guardex™ Sizes

 SAE Flywheel Housing
 6 5 4 3 2 1
 6 1/2 42            
 7 1/2 42            
 8 45            
 10 48,65            
 11 1/2 65,80            

SPECIAL ALUMINUM PUMP MOUNTING CASTINGS

 Engine Reference Information
Briggs Daihatsu Used on engines DM700/950. Use with Guardex 42FL-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.
Deere Used on 3011D/3015D/4020D/4020T. Use with Guardex 42FL 7-1/2 assembly
Kubota Super Mini
(B-1 Mounting)		 Used on engines Z400, D600, D722, V800, WG600 and WG750. Use with Guardex™ FL42-150 mm coupling assembly.
Kubota Super 3
(B-1 Mounting)		 Used on engines D1403, D1703, V1903 and V2203 KTC/Euro/U.S. Design. Use with Guardex 48FL210 or 220mm coupling assembly
Kubota Super 5
(B-1 Mounting)		 Used on engines D905, D1105, V1205, V1305 and V1505. Use Guardex™ 42FL-135 mm coupling assembly.
Kubota V3300 Use with l1011 casting and 48FL10 assembly, 1.500 OAL
GM 3.0/4.3L Used with GM flywheel # 93422872. Use with Guardex™ 48FL-10 or 65FL-10. 8" OD steel pilot washer provided with either assembly.
Hatz Semi SAE #5 Used on engines with compressed "G" dimension (23mm). Use with Guardex 45FL 8 assembly
Isuzu "L" Series Used with backplate option #8-97251-734-0 and flywheel options #8-97091-412-2 and 8-97091-410-1. Use with 42FL 7-1/2 assembly.
Nissan "H" 15/20/25 Series Use with 42FL150mm modified assembly, 13" OD flywheel.
Nissan "A" 15 Series Use with 42FL150mm modified assembly, 271mm OD flywheel.
Perkins PK 103-9-10 Used on Perkins rear end plate designs. Use with Guardex™ 42FL- 135 mm assembly.
Perkins PK 103-13-15 Used on Perkins rear end plate designs. Use with Guardex™ 48FL-155 mm assembly.
Perkins PK 104-22 Used on Perkins rear end plate designs. Use with Guardex™ 48FL-155 mm assembly.
Ford LRG 425 Foot mounted casting. Use with 42FL assembly (Flange #15390)
Ford VSG413 Foot mounted casting. Use with 42FL assembly (Flange #15385)
Cummins B3.3 Used on Semi SAE#4 housing with L1011 casting. Use with Guardex™ 48FLTSB10 assembly.
Yanmar 3/4TNE Used on E-2/EB-5 backplate design. Use with Guardex™ 42FL 7-1/2 assembly.


TYPICAL LAYOUT FOR A HYDROSTATIC PUMP
DIRECT-COUPLED TO AN ENGINE FLYWHEEL

Typical layout for a hydrostatic pump direct-coupled to an engine flywheel

Assembly:

1. Center nylon flange on engine flywheel O.D. pilot. Tighten flywheel flange bolts.
2. Center pump mounting plate on engine housing pilot. Tighten pump mounting bolts.
3. Mount steel hub on pump spline shaft. Tighten crossbolt clamp.
4. Slide pump and hub assembly through mounting plate pilot hole, into flange splines. Tighten pump mounting bolts.
5. (Special Advisory) Starting torque and braking loads should not exceed listed maximum torque. Intermittent transient peak loads should not exceed listed maximum torque.

ASSEMBLY CONFIGURATIONS




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