CAT CAT®621H Wheel dozer scraper

Console

Ergonomic layout

Brand new H Series worktops are ergonomically designed，Thus in a comfortable、Comprehensive machine control in a productive and safe environment。 All controls、Joystick、Reasonable layout of switches and instruments，Maximize productivity and reduce operator fatigue。

View

The wide field of vision gives a panoramic view of the surroundings，Clear line of sight at construction site，Gives the operator a clear view of the front of the machine and the cutting edge.。 The air conditioning unit has been moved under the cab，Improved operator visibility。

Operator comfort

Spacious cab

H Cab Enlargement for Series Scrapers 21%，Provide a more comfortable work area。 The spacious cab and wide doors make it easier to get in and out of the cab。 Increased use of glass，Gives the operator better visibility around the machine。

Steering column

The position of the steering column and pedals have been adjusted，When the seat is tilted during machine operation，Can provide more comfortable operation。 Regardless of operator size，Telescopic and tiltable adjustable steering column for a comfortable driving position。

Standard comfort features

H Series cabs are equipped with a number of features that improve operator comfort。 Standard comfort features include：Coat hook、Lunch-box storage platform with fixing belt、Air conditioner、Heating and radio preparation。

Seat options

H Series scrapers are equipped with Cat Comfortable seat，The movable distance is longer.，Allows the operator to flexibly adjust the sitting position，For optimum comfort and productivity。 The seat can be rotated up to 30 degrees to the right to give the operator a more comfortable position when loading，And can rotate up to 30 degrees to the left to make it easier for the operator to get in and out of the cab。 For unparalleled driving comfort，H Series scrapers are equipped with Cat Advanced Driving Management（ARM）Suspension seat，It uses active suspension to dampen vibrations.，And minimizes the shock loads experienced by the operator at the end of travel。

Integrate multiple technologies

Optional Sequence Aids、Loading AIDS and Cat Grade control automates many repetitive tasks for the operator。

T V-handle implement control lever

Redesigned control levers put the full functionality of the scraper in the hands of the operator。 Effortless joystick and convenient button and thumbwheel controls are ergonomically arranged，To minimize arm movement.。

Power train － Engine

ACERT Technology

Cat® C13 ACERT™ Engine to Caterpillar Development of systems and components as the cornerstone，Continuous innovation、Incremental improvement，Achieved breakthrough engine technology。 The engine is available in the U.S. EPA Tier 3/Ooh IIIA Equivalent Emissions Configuration or U.S. EPA Tier 4 Interim/Ooh IIIB Certified emission configuration，To meet the needs of global contractors。

Discharge

Equipped in accordance with the U.S. EPA Tier 4 Interim/Ooh IIIB Emissions standard engine for machine use Cat Clean the discharge module，To provide the performance and efficiency customers need while meeting emissions requirements。 Equipped with American EPA Tier 3/Ooh IIIA Machines with equivalent engines use silencers.，Instead of Cat Clean the discharge module。

Cat Clean the discharge module（CEM）

CEM Is an exhaust aftertreatment kit，Consists of diesel particulate filter and control system。 CEM Use of passive and active regeneration to reduce particulate emissions during normal engine operation。

Cat NOx emission reduction system（NRS）

Cat NOx emission reduction system（NRS）A small amount of exhaust gas can be capture and cooled，And then deliver to that combustion chamber to reduce the temperature of the combustion cham.，So that that emission of nitrogen oxide is reduced。

Diesel particulate filter regeneration

Regeneration is referred to from the diesel particulate filter（DPF）The process of eliminating soot.。 After-treatment regeneration equipment（ARD）For regeneration DPF。 DPF Capturing both particles and ash，Ash shall be removed at the specified maintenance interval。

Power train － Gearbox

Electronic transmission

Cat Eight-speed forward and first-speed reverse ECPC（Electronic Clutch Pressure Controlled，Electronic Clutch Pressure Control）The transmission has enhanced gear control logic，Provides an anti-hunting shift strategy，Ensures speed continuity and constant shift times。

Bulldozer's 1-2nd gear uses torque converter drive to increase torque；3-Direct drive in 8th gear for driveline efficiency。 Scraper gears are in torque converter driven，In order to obtain more torque during excavation

The transmission hold function maintains torque converter drive for maximum rimpull，Or hold the current gear for optimal control

Programmable Top Gear The available top gear can be set manually（3-8th gear），O as to match the operating conditions or transport speed

The neutral coast limiter prevents shifting into neutral while moving。

The transmission shifts smoothly

621H Equipped with ECPC STM（ECPC Shift Torque Management，ECPC Shift torque converter management system），With improvements SCL（Shift Control Logic，Gear control logic）And PTS（Part Throttle Shifting，Partial throttle shift）Function。 These features make shifting smoother，Acceleration is more effective when climbing a hill，While the torque is maintained by the gear lever。 In addition，SCL Automatic shift selection for desired machine operation is also available，And downshifts required for maximum acceleration when the throttle is increased。 PTS During partial throttle operation，Allows shifting at low speed，So that that fuel economy of the partial throttle is improve，Quieter machine operation，And operate better in reduce operating conditions.。

Braking performance

621H Use of hydraulically actuated wet disc brake，To provide excellent braking performance。 Standard Cat The engine brake reduces brake wear and improves machine control。

Structure

Cushion Hitch

Electronically actuated and combined with parallelogram linkage，Have extraordinary strength，Together with two nitrogen accumulators（4）And a free float piston（8），Provides a smooth ride，Thereby improving operator comfort.，Enhances machine durability。

Controlled oil flow（6）Cushioned rebound vibration

Flattening valve（7）Through the orifice（5）Apply pressure，Load the cylinder（1）The piston in the automatic housing

Use of steel castings to eliminate multiple weld joints，And increase the strength

Double kingpin design（2、3）It can withstand great external forces.，And simplifies installation and removal

Lock switch

There is an operator selectable lockout switch on the joystick，For locking the damping hinge，To improve control of the cutting edge during loading and unloading。

Nitrogen accumulator

Vertically mounted hydraulic cylinders transmit road impact forces to nitrogen accumulators。 The nitrogen accumulator absorbs and cushions the impact of the road surface.，Impact loads are prevented from being transmitted to the hinged member or the operator.。

Non-metallic shield and fuel tank

The new fuel tank is made of recyclable rotary grinding polyethylene.，And the fuel is kept clean by controlled filtering and purging ports。 New fuel tank with increased capacity，Operators are provided with more than 10 hours of shift time（Depending on the engine load factor）。 The new dozer guard is made of the same highly durable, rotary abrasive polyethylene。 Non-metallic guard prevents build-up when working in sticky material。

Scraper bowl

Redesigned Bucket

621H Use of new bucket design，Bucket capacity increased by 9% over previous model%，Therefore, the productivity is improved。 Low profile design for lower feed resistance，The honeycomb structure enhances the strength and impact resistance of the bucket sides and floor。

Hydraulic line protection

By running hydraulic lines through the bucket side wall，It can be prevented from being damaged on the construction site.，And that durability is improve。

Pushing system

Powerful pusher system minimizes residual material，Provide constant spreading control。 An overflow guard on the ejector helps retain the material，Prevent material from overflowing to the rear of the scraper。

The cutting edge and Cat Digging tool（GET）

Provide a variety of get（G.E.T.）Options，In order to optimize machine performance for different material types and loading conditions。 GET Options include standard serrated wear material（ARM）。 Most of them are reversible.，O as to prolong the service life，And that operation cost is reduce。

Mount options

Push loading

For maximum productivity，621H Should be by D8 or D9Track-type tractor for push loading。

Push and pull

For applications where large quantities of material need to be moved very quickly at low unit cost，Push-pull configuration is recommended。 The push-pull configuration concentrates the combined power of the two machines onto one cutting edge。 Push-pull scrapers work in pairs.，The rear scraper pushes the front scraper through the cut area。 When the scraper in front is full，The rear scraper lowers its bucket，And is pulled through the cutout area by the front scraper。 The result will be a self-loading system.。 Push-pull configuration with hydraulically actuated shackles and dashplates（Bolted to the front of the dozer）And a hook attached to the rear of the scraper。 By cooperating with each other，Push-pull scrapers can provide the lowest unit cost for many applications。 As a machine equipped with a single engine，621H The push-pull configuration is ideal for a good haul road with a slope of no more than +5% Easy loading applications for。

Integrate multiple technologies

Sequence assist device

The Sequential Aid uses integrated software and position sensing cylinders to automate the operator's loading and unloading operations,、Many tasks performed during shipping and unloading。 The operator only needs to set the preference values for the bucket and the gate height，Then press a button to make the machine ready for loading、Transportation、Unload and Return to Excavation Ready。 The system will automatically set the cushion hitch、Bucket height、Bucket gate and ejector。 A convenient load counter is included with the sequence aid，In order to keep track of the material that is moved。 By means of a sequence aid，Up to 14 separate implement and machine commands can be replaced by pressing one button four times，This gives the operator more time to prepare for the loading cycle and to observe the job site。

Loading aid

The load assist is based on the sequence assist，It loads the bucket by pressing a button.。 When the machine enters the cut area，The operator can activate the loading aid，So that the system takes over control of the cutting edge height，According to the integrated sensor and GPS Technology to limit tire rotation，This ensures that the bucket is always full。 The operator controls the throttle only、Steering and operating the hopper door。 The loading aid allows inexperienced operators to quickly increase productivity。

Cat Grade Control

Cat Grade control is an automated system，It uses the best earth-moving machinery.（Usually offers the lowest unit cost）To move the maximum amount of material，Help you control costs。 Due to the use of satellite positioning technology,，The automated system protects the cut by limiting the digging depth of the scraper。 This optional system is available from the factory，And is fully integrated into the machine，Works seamlessly with sequencing AIDS and loading AIDS。 Cat Other benefits of grade control include putting the site plan in front of the operator to improve efficiency and eliminate rework，And field mapping with a scraper。

WAVS（Work area vision system）

A camera on the machine provides the cutting edge.、View of the right side and rear of the machine。 The system not only improves security，It also provides a new way to see the cutting edge during loading and to see the rear of the machine when pushing or pulling with another scraper。

Comprehensive customer support

Choose

Before buying，Be sure to compare the machines in detail。 Cat® Your dealer can help you。

Purchase

Consider Resale Value，Compare productivity with daily operating costs and fuel consumption。

Operation

Best practice techniques to increase productivity and profit，Please refer to Cat Dealers request the latest training material，And consultation with trained staff。

Maintenance

The repair cost can be planned in advance through the repair option。 S·O·SSM And technical analysis help you avoid unplanned repair。

Replace

Is it maintenance or renovation?？ Cat An agent can help you assess the costs involved.，Help you make the right choice。

Product support

Through excellent global parts services、Trained technicians and《Customer Service Agreement》，Local Cat The agent can provide services for you in the whole process.。

Safe

Electric escalator

The new powered access ladder option greatly facilitates operator access to the cab。 The system is a stable ramp.，Folded under the cab。 The system can be activated using the keypad behind the access door near the ground。 In addition，Controls are also provided on the keypad in the cab。 The ladder provides firm and inclined support，Easier access to the cab。 For added security，Use LED The lamp provides illumination for the step。 The actuator under the cab is used to operate the ladder。 Not in use，The ladder will retract under the cab。 If the machine moves while the ladder is down，A clear alarm sound will be heard。 If the machine loses power，The operator can manually raise or lower the ladder using the handle in the cab or the handle next to the highest ladder step on the ladder。

In and out

Handrails are provided for safe operator access to the cab and for routine maintenance。

WAVS（Work area vision system）

A camera on the machine provides the cutting edge.、View of the right side and rear of the machine。 The system not only improves security，It also provides a new way to see the cutting edge during loading and to see the rear of the machine when pushing or pulling with another scraper。