Skyjack SJ643 TH

Name: Skyjack SJ643 TH
Brand: Skyjack

Configuration: Foam-filled 13x24 16PR tires, Deutz TCD 2.2L Tier 4 Final

16 sourced values · Sources: Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25; Skyjack SJ643 TH / SJ843 TH product page, specifications tab. Retrieved 2026-10-25

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Dimension diagram

A	Overall length	≈ 5,944 mm
B	Overall height	≈ 2,413 mm
C	Wheelbase	Not published
D	Ground clearance	≈ 483 mm
E	Overall width	≈ 2,565 mm
F	Track gauge / tread	Not published

Weights

Spec	Value	Source
Operating weight	≈ 9,392 kg	Published: 20,706 lb Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25
Max gross (laden) weight	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.

Dimensions

Spec	Value	Source
Overall length	≈ 5,944 mm	Published: 234 in Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Printed 19'6". O/A length, less forks.
Overall width	≈ 2,565 mm	Published: 101 in Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Printed 8'5".
Overall height	≈ 2,413 mm	Published: 95 in Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Printed 7'11". Overall height, stowed.
Wheelbase	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.
Track gauge / tread	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.
Ground clearance	≈ 483 mm	Published: 19 in Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Printed 19".
Turning radius	≈ 3,734 mm	Published: 147 in Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Printed 147". Turning radius, outside.

Undercarriage / tires

Spec	Value	Source
Undercarriage type	Wheeled, 4WD / 4WS (3-mode steering)	Published: Wheeled, 4WD / 4WS (3-mode steering) Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25
Number of axles	2	Published: 2 Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25
Wheels (count)	4	Published: 4 Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25
Tire size	13x24 16PR foam-filled	Published: 13x24 16PR foam-filled Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25

Ground pressure

Spec	Value	Source
Max tire ground bearing pressure (floor loading)	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.

Axle loads

Spec	Value	Source
Axle load, front (unladen/operating)	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.
Axle load, rear (unladen/operating)	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.
Axle load, front (laden/max)	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.
Axle load, rear (laden/max)	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.

Engine

Spec	Value	Source
Engine model	Deutz TCD 2.2L Tier 4 Final	Published: Deutz TCD 2.2L Tier 4 Final Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25
Net power	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published; only an unqualified engine hp rating is printed (stored as power_gross).
Gross power	≈ 55.2 kW ⚠ The manufacturer does not state the rating standard (gross or net). Filed as gross power; compare with care.	Published: 74 hp Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Printed 74 hp. Standard-hp ratings are not stated (SAE gross/net not specified).
Displacement	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.
Rated speed	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.

Hydraulics

Spec	Value	Source
Pump / aux flow	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.
System / relief pressure	Not published	Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Not published on the tear sheet or product page.

Performance

Spec	Value	Source
Max travel speed	≈ 27.4 km/h	Published: 17 mph Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Max travel speed, forward.
Rated / lift capacity	≈ 2,722 kg	Published: 6,000 lb Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Maximum lift capacity; 1,000 lb at max reach.
Lift / hinge-pin height	≈ 13,208 mm	Published: 520 in Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Printed 43'4". Maximum lift height.
Max forward reach	≈ 8,712 mm	Published: 343 in Skyjack SJ643 TH / SJ843 TH telehandler tear sheet (NA_ENG_SJ643-843_TH_TEAR_SHEET_2021.pdf), 07/2021; linked from skyjack.com/product/sj643-th. Retrieved 2026-10-25 Printed 28'7". Maximum forward reach.

Similar models

Brand	Model	Operating weight
JLG	SkyTrak 8042	≈ 9,616 kg
JLG	742	≈ 9,645 kg
Manitou	MTA 6642 E74	≈ 9,980 kg
Manitou	MTA 6642 Series IV	≈ 9,980 kg
JLG	SkyTrak 6042	≈ 8,664 kg
Genie	GTH-844	≈ 10,251 kg

Compare side by side with JLG SkyTrak 8042 and JLG 742