Model 4170C 29.8' - 69.8', 3-Piece Boom Standard Specifications

• Boom: The 29.8' to 69.8', three section boom features fully proportional hydraulic extension and retraction. Its welded steel box construction has replaceable wear pads and bushings. A laid out luff cylinder increases load capacity at all boom angles. Maximum tip height is 79'. Elevation -3 to 80 degrees.
  
  
• Boom Tip: Four sheaves with roller bearings, cable stays, and pad eye for wedge socket provide the ability to reeve from 1 to 6 parts of line without requiring attachment of snatch blocks. Boom tip has quick reeve design that does not require removal of wedge socket to change parts of line. The use of non-metallic sheaves reduces boom weight and increases cable life.
  
  
• Upperworks: The mast mounts on a 39" diameter swing bearing and is driven by a planetary gearbox with integral spring applied brake. The standard hydraulic and electric rotary swivels provide 360 degree continuous rotation, and are accessible from the top of the deck for ease of maintenance. Provision for mounting auxiliary winch is standard.
  
  
• Controls: Outrigger controls are operated from the ground on both sides at the rear. Boom controls are located in the seat armrests in the operators cab. All controls are fully proportional.
  
  
• Operators Cab: Aluminized steel construction. Features include slide back door, tilt open sunroof, 5 way adjustable seat, windshield wiper, dome light, fan, multi-function joystick controls, engine on/off, and foot throttle. A pull out access platform is also included.
  
  
• Hydraulic System: Hydraulic system includes transmission mounted PTO, gear pump, and hydraulic reservoir with sight gauge, breather, and reservoir mounted 10 micron full flow return filter.
  
  
• Outriggers: Computer optimized outrigger system features 24' spread rear, and 18' spread front out and down type outriggers. Firm footing is achieved by means of 24" diameter removable aluminum pads.
  
  
• Subframe: A high capacity torsion box connects the crane and outriggers into an integral structure designed to withstand all loads produced during crane operation. The design does not rely on the truck chassis for strength which allows for mounting on a lighter and more economical truck. The clamp-type mounting requires no welding or drilling on the chassis rails and thus maintains full factory warranty.
  
  
• Body: A partial, non-skid steel deck is provided with access ladders on both sides, pad racks, and all DOT required lighting. Prior to assembly, all components are pre-painted in customer's choice of colors, with epoxy primer and polyurethane topcoat to ensure maximum protection.
  
  
• Load Chart: Each crane is load and stability tested before completion. This results in an individual load chart that is optimized for each crane.
  
  
• Winch and Reeving: Standard winch has variable speeds, power up and power down, planetary drive with spring applied, hydraulically-released brake.
  Maximum base layer line pull: 12,000 lbs.
  Maximum top layer : 225 Ft./min
  Reeving: Six parts of line standard
  Rope: 450' - 9/16" diameter, Flex-X-19
  Load Block: 22-ton quick reeve block, triple sheave with roller bearings, swivel hook and heavy duty safety latch.
  
  
• One operation, parts, and maintenance manual is included.

  Options

Axle Weights (LB.) Distribution

	Truck	Crane	Complete Unit
Front Axle	9,950	5,250	15,200
Rear Axle	8,880	23,020	31,900
Total	18,830	31,900*	47,100

*Includes 3000 lbs. of counterweight inside torsion box.

Load Chart for 4170C

Radius in Feet	Over Rear			Over Side			Over Front
	30' Boom	50' Boom	70' Boom	30' Boom	50' Boom	70' Boom	30' Boom	50' Boom	70' Boom
8	47,080*			47,080*			47,080*
10	40,860			40,860			40,860
12	36,480	30,410		36,480	30,410		36,480	30,410
15	29,360	25,790		29,360	25,790		29,360	25,790
18	23,770	22,650	19,900	23,770	22,650	19,900	23,770	22,650	19,900
20	21,000	21,060	18,300	21,000	21,060	18,300	21,000	21,060	18,300
25	15,980	16,160	15,370	15,980	16,160	15,370	15,980	16,160	15,370
29	12,800	-	-	12,800	-	-	12,900	-	-
30		12,740	12,710		12,740	12,710		12,740	12,710
35		10,300	10,280		10,300	10,280		10,300	10,280
40		8,480	8,470		8,480	8,470		8,480	8,470
45		7,060	7,070		7,060	7,070		7,060	7,070
49		5,900	-			-		5,900	-
50			5,950			5,950			5,950
55			5,030			5,030			5,030
60			4,260			4,260			4,260
65			3,610			3,610			3,610
69			3,000			2,900			3,100

*Maximum load with standard reeving is 44,000 LB.
Numbers shown in bold type (above tipping line) indicate structural capacity limits. All other numbers indicate tipping limits. Actual numbers may vary due to differences in finished weight, wheelbase, etc.

Do not exceed parts of line rating.

Fly jib load chart

70 Foot Boom + 29 Foot Fly Jib
		Over Rear	Over Side	Over Front
Working Radius	Boom Angle	Rated Load	Rated Load	Rated Load
20	79	6670	6670	6670
25	76	6220	6220	6220
30	74	5890	5890	5890
35	71	5600	5600	5600
40	68	5380	5380	5380
45	65	4850	4850	4850
50	62	4720	4720	4720
55	58	4450	4450	4450
60	55	4320	4320	4320
65	51	3850	3850	3850
70	47	3320	3320	3320
75	42	2870	2870	2870
80	37	2460	2460	2460
85	32	2110	2110	2110
90	25	1790	1790	1790
95	16	1510	1510	1510
98	0	1350	1350	1350

Structural Load Chart Radius in Feet Boom Angle 29.8 Foot Boom Boom Angle 50 Foot Boom Boom Angle 69.8 Foot Boom 8 76 47,080* 10 72 40,860 12 68 36,480 78 30,410 15 61 29,360 75 25,790 18 54 23,770 71 22,650 78 19,900 20 49 21,000 68 21,060 77 18,300 25 34 15,980 62 16,160 72 15,370 29 0 12,800 30 55 12,740 68 12,710 35 47 10,300 63 10,280 40 38 8,480 58 8,470 45 26 7,060 52 7,070 49 0 5,900 50 47 5,950 55 40 5,030 60 33 4,260 65 23 3,610 69 0 3,000