Genuine XCMG 804022078 Hydraulic Lock Assembly | for SQS300-4 Truck Crane

Dedicated Technical Support & Original Industry Standards

🔵 High-precision bi-directional locking technology ensures that hydraulic cylinders remain firmly in position, critical for outrigger and boom stability.

🔵 Manufactured to XCMG’s strict original equipment engineering standards (101526), featuring superior pressure resistance and reliable leak-proof performance.

🔵 KMN provides expert technical verification to ensure this 804022078 lock matches your crane’s specific hydraulic system and VIN requirements perfectly.

Detailed XCMG 804022078 Equipment Compatibility & Product Specifications

🔵 Component Designation: Hydraulic Lock Assembly / Two-way Lock (双向液压锁)

🔵 Part Number: 804022078

🔵 Manufacturer Model: 101526 / SQS300-4

🔵 Compatibility: XCMG SQS300-4 Truck Mounted Cranes, XCT55_S Truck Cranes, and SINOTRUK HOWO/SITRAK Hydraulic Systems.

🔵 Operating Condition: 100% Brand New Original Factory Inventory

Advantages of Ordering from KMN Spare Parts

✅ Guaranteed Factory Authenticity: 100% original, factory-verified parts.

✅ Expert VIN Verification: Technical cross-reference via official databases.

✅ Highly Competitive Bulk Rates: Tiered pricing for fleet managers.

✅ Rapid Global Shipping: Express couriers (DHL/UPS/FedEx) or sea/air freight.

✅ Strategic Warehousing: Fast dispatch from major Chinese manufacturing hubs.

Step-by-Step Guide to Receive a Quick Quote

⭐ Step 1: Share machine model, serial number (VIN), or a photo of the nameplate.

⭐ Step 2: Confirm required material number and desired order quantity.

⭐ Step 3: Provide target delivery country and postal code for freight estimation.

⭐ Step 4: Share China-based forwarder details if local delivery is required.

How to contact us quickly

“Ask For Quote” at the bottom right corner of the webpage to start WhatsApp.

• 📧 E-mail: info@kmnparts.com
• 📞 Mobile Call: +86 1347 5858 598 (WhatsApp/WeChat)
• 🏬 Central Headquarter: No 51, Taiping Road, Qingdao City, CHINA
• 🔶 Branch Office (XCMG WIKA): Xuhai Road, Jiawang District, Xuzhou City, CHINA
• 🔶 Branch Office (ZOOMLION SANY): Kaiyuan Road, Changsha City, CHINA
• 🔶 Branch Office (SEM WEICHAI SHANTUI): Caterpillar Industrial Park, Qingzhou, CHINA

SQ12SK3Q Truck-mounted Crane SPARE PARTS CATALOGUE
350800307 Telescopic cylinder assembly

1 350802167 伸缩油缸 Telescopic cylinder
2 805100047 螺钉 M12×40 Allen screw 4 GB/T70.1-2008
3 805300018 垫圈 12 Gasket 10 GB/T93-2002
4 350701782 销轴 Pin shaft 1 1033P 03 19 00 00 11
5 805400071 挡圈 15 Check ring for shaft
6 805000237 螺栓 M8×45 Hexagon bolt 2 GB/T5783-2000
7 805300010 垫圈 8 Gasket 2 GB/T93-2002
8 350701781 挡绳板 Baffle for rope 2 1033P 03 19 00 00 10
9 350701783 销子 Pin shaft 1
10 805000322 螺母 M8 Nut 8 GB/T5783-2000
11 350802169 滚轮 Idler wheel 1 1233P 03 19 00 00 09
12 805400002 挡圈 30 Check ring for shaft
13 350701782 销轴 Pin shaft 1 1033P 03 19 00 00 11
14 350701776 挡板 Baffle 4 1033P 03 19 00 00 05
15 805000008 螺栓 M10×20 Hexagon bolt 6 GB/T5783-2000
16 805338220 弹簧垫圈 10 Gasket 2 GB/T93-2002
17 350701774 轴 Shaft 2 1033P 03 19 00 00 03
18 800552190 轴承 NUP2311E Bearing 2 GB/T283-2007
19 350701777 滑轮 Pulley 1 1033P 03 19 00 00 06
20 350701778 隔套 Separate ringer 1 1033P 03 19 00 00 07

SQ12SK3Q Truck-mounted Crane SPARE PARTS CATALOGUE Boom extension rope assembly

1 350802111 基本臂 Base boom 1 1233P 03 01 00 00 00
2 350802170 绳排 Wire rope 1 1233P 03 19 13 00 00
3 350802112 第一节伸缩臂 Telescoping boom I 1
4 350802115 粗拉索 Thick cable 2 1233P 03 09 00 00 00
5 350802113 第二节伸缩臂 Telescoping boom II 1
6 350802114 第三节伸缩臂 Telescoping boom III 1
7 805200052 螺 母 M20 Nut 4 GB/T6170-2000
8 350600074 支 架 Ringer 2 0833B 03 15 00 00 00
9 350802116 细拉索 Thin cable 2 1033A 03 11 00 00 00
10 805200070 螺 母 M18 Nut 8 GB/T6170-2000
11 350802117 细拉索 Thin cable 1 1033A 03 10 00 00 00