OPERATION

2.3 Tractor Horsepower

The horsepower required to operate the mower depends on several operating factors including the vegetation to be cut, terrain condition, operator experience, condition of the mower and tractor, and others. For most mowing conditions, the SR14 and SR20 mower requires a tractor with a minimum of 75 HP. Operating the mower with a tractor that does not have adequate power may damage the tractor engine. Exceeding 100 HP for a 540 RPM drive and 140 HP for a 1000 RPM drive may cause mower damage by overpowering the unit in heavy cutting conditions.

2.4 Drawbar

The tractor drawbar must be positioned at a certain length based on the operating speed of the mower for proper driveline operation. If the mower is a 540 RPM unit, position the drawbar length from shaft end to hitch hole at 14”. For 1000 RPM mowers, set the drawbar length at 16” for 21 spline 1-3/8” mowers and at 20” for 1-3/4” 20 spline mowers.

Ensure that the drawbar is rated to carry the tongue weight of the mower.

Tractor Drawbar Length

(Based on Mower Operating Speed)

 

14" (540 RPM 1-3/8”-6)

 

 

 

 

TONGUE

16" (1000 RPM 1-3/8”-21)

20” (1000 RPM 1-3/4”-20)

 

 

DRAWBAR

Pintle Hook Hitch-Optional Equipment

Drawbar length must be modified to obtain dimension "A" (CV Driveline = 17" ± 2", Standard Driveline = 19 ± 2").

Tongue

PTO

Shaft

A

Drawbar

OPERATION

P i n t l e Clevis

Tongue Cont. Rod

P i n t l e Hook

Pintle Hook Mount

2.5 Tractor Hydraulics

The mower center section and each wing are positioned with hydraulic cylinders that are operated by the tractor hydraulic pump. The tractor must have a minimum of 2 hydraulic control valves devoted to the mower unless the tractor is fitted with a 3-spool control valve (extra equipment).

A 3-spool control valve is required if the tractor is equipped with a single valve and is recommended for those with two valves so that the center section and each wing can be controlled independent of one another. Refer to the Assembly Section of this manual for properly equipping the tractor with a 3-spool control valve. Tractors equipped with three hydraulic ports can position the center section and each wing independently with no extra equipment. If the tractor is equipped with only two hydraulic ports and a 3-spool control valve is not used, the wings cannot be operated independently and will raise and lower at different speeds.

SR14/SR20 10/03

Operation Section 4-7

© 2004 Alamo Group Inc.

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Alamo SR14, SR20 manual Tractor Horsepower, Drawbar, Tractor Hydraulics

SR14, SR20 specifications

The Alamo SR14 and SR20 models represent the cutting edge of modern military vehicle technology, designed to cater to both light tactical and heavy-duty utility roles. These vehicles are engineered for versatility, durability, and performance, making them essential assets for military operations across various terrains.

The Alamo SR14 is designed as a lightweight, multipurpose tactical vehicle. One of its main features is its rugged construction, which combines advanced materials with a streamlined design. This not only enhances its mobility and speed but also ensures a high degree of protection against small arms fire and shrapnel. The SR14 is equipped with a powerful turbocharged diesel engine, providing reliable performance and a high torque output, facilitating off-road capabilities and adaptability in challenging environments.

Key technologies in the SR14 include an advanced all-wheel-drive system, which enables effective traction on various surfaces. Additionally, the vehicle incorporates state-of-the-art suspension systems, allowing for superior maneuverability and stability even in rough terrains. The spacious cabin accommodates a crew of up to four personnel and can be configured for various roles, such as command and control, reconnaissance, or logistics support.

On the other hand, the Alamo SR20 is a slightly larger variant that emphasizes heavy-duty operations while retaining many of the SR14's capabilities. With a higher payload capacity and expanded space for equipment, the SR20 is ideal for transporting supplies, ammunition, and medical evacuation. It also comes with enhanced armor options, allowing for an increased level of protection against more significant threats.

Notable features of the SR20 include a digital communication system that integrates seamlessly with existing military networks, ensuring real-time information sharing and situational awareness. The vehicle can be fitted with various weapon systems, transforming it into an effective mobile platform for combat support.

Both SR14 and SR20 exhibit fuel efficiency, reducing logistical burdens during extended missions. High-visibility lighting systems and rugged bumpers enhance operational safety, while a modular design allows for easy maintenance and upgrades. The Alamo SR series epitomizes modern military vehicle design, meeting the diverse needs of today's armed forces with efficiency and effectiveness.